docs: add missing hook events from official CHANGELOG (v2.1.9-v2.1.10)
- Add 3 missing events to Section 7.1: Setup, PermissionRequest, SubagentStop
- Document PreToolUse additionalContext feature (v2.1.9+)
- Create 3 production-ready hook templates (setup, permission, subagent)
- Add resource evaluation documenting rejection of secondary source
Source: Official Claude Code CHANGELOG, not external blog posts
Closes gap identified during resource evaluation process
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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