feat: complete fakemui accessibility integration with data-testid and ARIA

Complete implementation of accessibility utilities across fakemui components:

**New Files**:
- src/utils/accessibility.ts - Core accessibility utilities (moved from legacy)
- src/utils/accessibility.module.scss - Accessibility SCSS styles
- src/utils/useAccessible.ts - React hooks for accessibility:
  * useAccessible() - Generate test IDs and ARIA attributes
  * useKeyboardNavigation() - Handle keyboard events
  * useFocusManagement() - Programmatic focus control
  * useLiveRegion() - Screen reader announcements
  * useFocusTrap() - Focus trapping for modals

**Component Updates**:
- Button.tsx - Added data-testid and ARIA support via useAccessible hook
- TextField.tsx - Added data-testid, aria-invalid, aria-describedby support

**Documentation**:
- docs/ACCESSIBILITY_INTEGRATION.md - Complete integration guide with examples

**Features**:
- 50+ preset test ID generators (form, canvas, settings, navigation, etc.)
- ARIA attribute patterns for buttons, toggles, dialogs, tabs, live regions
- Keyboard navigation helpers (Enter, Escape, Arrow keys, Tab)
- Accessibility validators (hasLabel, isKeyboardAccessible, etc.)
- Fully typed TypeScript with AccessibilityFeature, Component, Action types

All components now support reliable testing via data-testid and screen reader access via ARIA attributes.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

workflow/plugins/python/requirements-backend.txt

@@ -0,0 +1,18 @@
+# Backend Plugin Dependencies
+# These dependencies are required for backend/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# Backend-specific clients
+openai>=1.3.0         # backend_create_openai: OpenAI API client
+slack-sdk>=3.23.0     # backend_create_slack: Slack API client
+PyGithub>=2.1.1       # backend_create_github: GitHub API client
+discord.py>=2.3.2     # backend_create_discord: Discord API client
+
+# Environment and configuration
+python-dotenv>=1.0.0  # backend_load_env: Load environment variables
+
+# Utilities
+tenacity>=8.2.3       # Retry logic for API calls

workflow/plugins/python/requirements-dev.txt

@@ -0,0 +1,23 @@
+# Development Dependencies for Python Workflow Plugins
+# Use this for development, testing, and linting
+# Last Updated: 2026-01-23
+
+# Include all plugin dependencies
+-r requirements.txt
+-r requirements-backend.txt
+-r requirements-web.txt
+-r requirements-notifications.txt
+-r requirements-packagerepo.txt
+-r requirements-testing.txt
+-r requirements-tools.txt
+
+# Code quality and linting
+black>=23.12.0        # Code formatter
+flake8>=6.1.0         # Style guide enforcement
+mypy>=1.7.1           # Static type checker
+pylint>=3.0.3         # Code analysis
+isort>=5.13.2         # Import sorting
+
+# Development utilities
+pytest-cov>=4.1.0     # Code coverage reporting
+pytest-mock>=3.12.0   # Mock utilities for pytest

workflow/plugins/python/requirements-notifications.txt

@@ -0,0 +1,10 @@
+# Notifications Plugin Dependencies
+# These dependencies are required for notifications/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# Notification service clients
+slack-sdk>=3.23.0     # notifications_slack: Slack API client
+discord.py>=2.3.2     # notifications_discord: Discord API client

workflow/plugins/python/requirements-packagerepo.txt

@@ -0,0 +1,15 @@
+# Package Repository Plugin Dependencies
+# These dependencies are required for packagerepo/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# Data validation and processing
+pydantic>=2.5.0       # Entity validation and data models
+
+# Authentication
+PyJWT>=2.8.1          # JWT token verification for auth_verify_jwt
+
+# HTTP utilities
+requests>=2.31.0      # HTTP requests for package operations

workflow/plugins/python/requirements-testing.txt

@@ -0,0 +1,10 @@
+# Testing Plugin Dependencies
+# These dependencies are required for test/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# Testing frameworks
+pytest>=7.4.3         # test_run_suite: Pytest framework for running tests
+pytest-asyncio>=0.21.1  # Support for async test execution

workflow/plugins/python/requirements-tools.txt

@@ -0,0 +1,12 @@
+# Tools Plugin Dependencies
+# These dependencies are required for tools/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# HTTP utilities
+requests>=2.31.0      # tools_create_pull_request, tools_list_files
+
+# Git and version control
+PyGithub>=2.1.1       # tools_create_pull_request: GitHub API client

workflow/plugins/python/requirements-web.txt

@@ -0,0 +1,16 @@
+# Web Plugin Dependencies
+# These dependencies are required for web/* plugins
+# Last Updated: 2026-01-23
+
+# Include base requirements
+-r requirements.txt
+
+# Web framework
+Flask>=3.0.0          # web_create_flask_app: Flask web framework
+Flask-CORS>=4.0.0     # CORS support for Flask applications
+
+# HTTP utilities
+requests>=2.31.0      # HTTP requests for web operations
+
+# Environment management
+python-dotenv>=1.0.0  # For environment variable management

workflow/plugins/python/requirements.txt

@@ -0,0 +1,46 @@
+# MetaBuilder Python Workflow Plugins - Master Requirements File
+# This file consolidates all dependencies across Python workflow plugins
+# Last Updated: 2026-01-23
+# Python Runtime: 3.9+
+
+# Core Dependencies - Required by all plugins
+python-dotenv>=1.0.0  # Backend: load_env plugin
+tenacity>=8.2.3       # Core: exponential backoff for API calls
+
+# API Clients - Backend plugins
+openai>=1.3.0         # backend_create_openai
+slack-sdk>=3.23.0     # backend_create_slack, notifications_slack
+PyGithub>=2.1.1       # backend_create_github
+discord.py>=2.3.2     # backend_create_discord, notifications_discord
+
+# Web Framework
+Flask>=3.0.0          # web_* plugins for creating Flask apps
+Flask-CORS>=4.0.0     # web_* plugins for CORS support (implicit from Flask dependencies)
+
+# Web/HTTP Utilities
+requests>=2.31.0      # tools_create_pull_request, web utilities
+
+# Data Processing & Validation
+pydantic>=2.5.0       # packagerepo: normalize_entity, validate_entity
+
+# Database (if packagerepo plugins need DB access)
+PyJWT>=2.8.1          # packagerepo: auth_verify_jwt
+
+# Testing Frameworks
+pytest>=7.4.3         # test_* plugins
+pytest-asyncio>=0.21.1  # For async test execution
+
+# Optional/Conditional Dependencies (installed on demand)
+# Note: These are dynamically imported in plugins, so install as needed
+
+# For advanced logging (optional)
+# logging-json>=2.0.0
+
+# For database support (optional, uncomment if needed)
+# psycopg2-binary>=2.9.9  # PostgreSQL
+# pymongo>=4.6.0          # MongoDB
+# redis>=5.0.1            # Redis
+
+# For distributed task processing (optional)
+# celery>=5.3.4
+# kafka-python>=2.0.2