Add microagents scaffolding for SDLC workflows

- Created ExampleAgent, BuildAgent, TestAgent, LintAgent, DocGenAgent, DeployAgent, DepUpdateAgent, RoadmapAgent under agents/
- Added CLI stubs and READMEs for each agent
- Updated AGENTS.md with all agent entries

Co-authored-by: openhands <openhands@all-hands.dev>

agents/RoadmapAgent/README.md

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+# RoadmapAgent
+
+RoadmapAgent allows viewing and updating the project roadmap (`docs/ROADMAP.md`).
+
+## Requirements
+
+- Python 3.6+
+
+## Installation
+
+No installation required. Ensure the script is executable:
+
+```bash
+chmod +x agents/RoadmapAgent/main.py
+```
+
+## Usage
+
+```bash
+./agents/RoadmapAgent/main.py (--view | --add ITEM)
+```
+
+### Options
+
+- `-v, --view`: Display the current roadmap from `docs/ROADMAP.md`.
+- `-a, --add ITEM`: Append a new item to the roadmap.
+
+## Examples
+
+View the roadmap:
+```bash
+./agents/RoadmapAgent/main.py --view
+```
+
+Add a new roadmap entry:
+```bash
+./agents/RoadmapAgent/main.py --add "Support multi-arch builds"
+```

agents/RoadmapAgent/main.py

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+#!/usr/bin/env python3
+
+import argparse
+import sys
+from pathlib import Path
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="RoadmapAgent: view or update the project roadmap (docs/ROADMAP.md)"
+    )
+    group = parser.add_mutually_exclusive_group(required=True)
+    group.add_argument(
+        '--view', '-v',
+        action='store_true',
+        help='Display the current roadmap'
+    )
+    group.add_argument(
+        '--add', '-a',
+        metavar='ITEM',
+        help='Append a new item to the roadmap'
+    )
+    args = parser.parse_args()
+    roadmap_path = Path(__file__).parent.parent / 'docs' / 'ROADMAP.md'
+
+    if args.view:
+        if not roadmap_path.exists():
+            print(f"Roadmap file not found at {roadmap_path}", file=sys.stderr)
+            sys.exit(1)
+        print(roadmap_path.read_text())
+        sys.exit(0)
+
+    if args.add:
+        # Append new roadmap item
+        entry = f"- {args.add}\n"
+        try:
+            with open(roadmap_path, 'a') as f:
+                f.write(entry)
+            print(f"Added roadmap item: {args.add}")
+            sys.exit(0)
+        except Exception as e:
+            print(f"Failed to update roadmap: {e}", file=sys.stderr)
+            sys.exit(1)
+
+if __name__ == '__main__':
+    main()