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

skills/deep-dive/README.md

@@ -0,0 +1,82 @@
+# deep-dive
+
+A Kiro agent skill that analyzes codebases, documentation, APIs, or product specs and produces a structured technical report for developers.
+
+## Architecture
+
+![Architecture](assets/deep-dive-architecture.svg)
+
+## Workflow
+
+![Workflow](assets/deep-dive-workflow.svg)
+
+## What it does
+
+Given any technical material — source code, README, OpenAPI spec, pasted docs, or just a topic name — the agent produces a detailed Markdown report covering:
+
+- System overview and design philosophy
+- Architecture diagram (PlantUML)
+- Key concepts & terminology glossary
+- Data model with ER diagram
+- Core flows with sequence diagrams
+- API / interface reference
+- Configuration & deployment notes
+- Extension and integration points
+- Observability (logging, metrics, tracing)
+- Known limitations and trade-offs
+- Actionable further reading recommendations
+
+## When to Use
+
+Activate this skill when a developer says things like:
+- "help me understand this codebase"
+- "deep dive into X"
+- "onboard me to this service"
+- "how does X work"
+- "analyze this doc / spec"
+- "详细分析 X 架构 / 部署流程"
+
+## Accepted Inputs
+
+| Input type | Example |
+|---|---|
+| File path(s) | `src/`, `docs/api.yaml`, `main.go` |
+| Pasted text | README content, architecture notes |
+| Topic name | "Kafka consumer groups", "Redis internals" |
+| URL | Link to documentation or spec |
+
+When given a directory, the skill automatically scans `README*`, `docs/`, entry-point files, and package manifests.
+
+## Example Prompts
+
+```
+Give me a deep dive on the Kafka consumer group rebalancing protocol.
+```
+
+```
+Analyze this FastAPI service and explain how it works: [paste README]
+```
+
+```
+Help me understand the worker pool in src/worker/pool.go
+```
+
+## File Structure
+
+```
+skills/deep-dive/
+├── SKILL.md
+├── README.md                  # this file
+├── assets/
+│   ├── report-template.md
+│   ├── workflow.puml
+│   └── deep-dive-workflow.svg
+└── evals/
+    └── evals.json
+```
+
+## Evals
+
+```bash
+python scripts/run_evals.py deep-dive
+```