refactor: use list(enabled|pinned|disabled) dropdowns, auto-generate from extract_tools.py

Replace two-section bool toggles (enabled_tools + pinned_tools) with
a single dropdown per tool: list(enabled|pinned|disabled). This halves
the config by eliminating the separate pinned_tools section.

Extend extract_tools.py to auto-generate:
- config.yaml options and schema sections (between markers)
- translations/en.yaml (tool names from @mcp.tool title attributes)

New tools added to the codebase are automatically included when
extract_tools.py runs (post-merge via sync-tool-docs.yml workflow).

Update start.py to parse the new tools_* group format with string
states instead of nested enabled_tools/pinned_tools bool dicts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kingpanther13