docs: Add CLAUDE.md project instructions and update .gitignore

- Add CLAUDE.md with comprehensive project guidelines
- Include thesis targets, repository layout, and development guardrails
- Remove CLAUDE.md from .gitignore to track project instructions
- Document SPARC development environment configuration

This provides clear guidance for AI-assisted development and ensures
reproducible builds aligned with thesis requirements.

Author: thc1006

.gitignore

@@ -78,7 +78,6 @@ lint/generated/
 lint/outputs/
 lint/tmp/
 lint-results*.xml
-CLAUDE.md
 .gradle/buildOutputCleanup/buildOutputCleanup.lock
 
 # Claude Flow generated files