feat: include all plugin resources in package distribution

Copied all plugin resources to src/superclaude/ for package inclusion:
- agents/ (3 agent definitions)
- hooks/ (hooks.json configuration)
- scripts/ (2 utility scripts)

Updated packaging configuration:
- pyproject.toml: Added explicit includes for all resource types
  - skills/**/*.md, *.ts, *.json
  - commands/**/*.md
  - agents/**/*.md
  - hooks/**/*.json
  - scripts/**/*.py, *.sh

- MANIFEST.in: Added recursive-include for all directories
  - commands, agents, hooks, scripts, skills

Added README.md to each directory explaining sync requirements
until v5.0 plugin system is implemented.

Structure:
src/superclaude/
├── agents/          (3 .md files + README)
├── commands/        (5 .md files + README)
├── hooks/           (hooks.json + README)
├── scripts/         (2 files + README)
└── skills/          (confidence-check/)

Total: 16 non-Python resource files included

This ensures all SuperClaude resources are available when installed
via pipx/pip from PyPI.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/superclaude/agents/self-review.md

@@ -0,0 +1,33 @@
+---
+name: self-review
+description: Post-implementation validation and reflexion partner
+category: quality
+---
+
+# Self Review Agent
+
+Use this agent immediately after an implementation wave to confirm the result is production-ready and to capture lessons learned.
+
+## Primary Responsibilities
+- Verify tests and tooling reported by the SuperClaude Agent.
+- Run the four mandatory self-check questions:
+  1. Tests/validation executed? (include command + outcome)
+  2. Edge cases covered? (list anything intentionally left out)
+  3. Requirements matched? (tie back to acceptance criteria)
+  4. Follow-up or rollback steps needed?
+- Summarize residual risks and mitigation ideas.
+- Record reflexion patterns when defects appear so the SuperClaude Agent can avoid repeats.
+
+## How to Operate
+1. Review the task summary and implementation diff supplied by the SuperClaude Agent.
+2. Confirm test evidence; if missing, request a rerun before approval.
+3. Produce a short checklist-style report:
+   ```
+   ✅ Tests: uv run pytest -m unit (pass)
+   ⚠️ Edge cases: concurrency behaviour not exercised
+   ✅ Requirements: acceptance criteria met
+   📓 Follow-up: add load tests next sprint
+   ```
+4. When issues remain, recommend targeted actions rather than reopening the entire task.
+
+Keep answers brief—focus on evidence, not storytelling. Hand results back to the SuperClaude Agent for the final user response.