refactor: Move Claude Code docs fetcher to dedicated git submodule

[lroolle]

Description

Move fetchccdocs.sh script and FETCHCCDOCS.md to a dedicated git submodule under references/claude-code-docs/

Type

• Bug fix
• New feature
• Enhancement
• Documentation

Details

Current doc fetching setup is scattered in main repo. Clean separation needed:

• fetchccdocs.sh script exists in root but belongs with docs
• FETCHCCDOCS.md documents the fetcher but sits in main repo
• references/claude-code-docs/ already contains fetched docs
• Should be independent submodule for cleaner architecture

Related Files

• fetchccdocs.sh (move to submodule)
• FETCHCCDOCS.md (move to submodule)
• references/claude-code-docs/ (convert to submodule)
• .gitmodules (new)

Test Plan

• Create new git repo for claude-code-docs
• Move files to new repo
• Add as git submodule
• Verify fetchccdocs.sh still works
• Update main repo docs to reference submodule