chore: restructure skills repo with new agents and skill bundles

- Add new skills: deep-dive, docs-rag, meta-creator, ppt-maker, sdlc
- Add agent configs: g-assistent, meta-creator, sdlc with prompt files
- Add reference docs for custom agents and skills specification
- Add utility scripts: install-agents.sh, orchestrate.py, puml2svg.sh
- Update README and commit-message skill config
- Remove deprecated skills: codereview, python, testing, typescript
- Add .gitignore

.kiro/agents/commit-message.json

@@ -1,10 +1,10 @@
 {
   "name": "commit-message",
-  "description": "Agent specializing in generating Conventional Commits messages.",
-  "prompt": "You are an expert at generating git commit messages following the Conventional Commits 1.0.0 specification. Your goal is to analyze staged changes and provide a high-quality, professional commit message. Always use the `commit-message` skill for guidance.",
+  "description": "Agent specializing in generating Conventional Commits messages. Use when the user wants to commit changes, needs a commit message suggestion, or is ready to wrap up a task.",
+  "prompt": "file://prompts/commit-message.md",
   "tools": ["fs_read", "execute_bash", "grep", "glob"],
-  "allowedTools": ["fs_read", "execute_bash", "grep", "glob"],
+  "allowedTools": ["fs_read", "grep", "glob"],
   "resources": [
-    "skill://skills/commit-message/SKILL.md"
+    "skill://.kiro/skills/commit-message/SKILL.md"
   ]
 }