Polish repo for public release

- README: centered header, badge row (license, agents, skills, hooks,
  rules, Claude Code, Ko-fi), "Why This Exists" motivation section,
  table of contents, "Collaborative Not Autonomous" section,
  community section
- Add GitHub issue templates (bug report + feature request)
- Add pull request template with checklist
- Add .github/FUNDING.yml with Ko-fi link
- Gitignore internal planning docs, remove from tracking

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,27 @@
+## Summary
+
+Brief description of what this PR does.
+
+## Type of Change
+
+- [ ] New agent
+- [ ] New skill
+- [ ] New hook or rule
+- [ ] Bug fix
+- [ ] Documentation improvement
+- [ ] Other:
+
+## Changes
+
+-
+-
+-
+
+## Checklist
+
+- [ ] I've tested this in a Claude Code session
+- [ ] New agents include the Collaboration Protocol section
+- [ ] New skills use the subdirectory format (`.claude/skills/<name>/SKILL.md`)
+- [ ] Reference docs are updated (agent-roster, skills-reference, hooks-reference, rules-reference)
+- [ ] Hooks use `grep -E` (POSIX) and fail gracefully without jq/python
+- [ ] No hardcoded paths or platform-specific assumptions