Add local development infrastructure and documentation

Add essential development tools and documentation for Cthulhu development:

Development Scripts:
- build-local.sh: Local build and install to ~/.local
- clean-local.sh: Clean build artifacts and local installation
- test-local.sh: Test local installation

Documentation:
- README-REMOTE-CONTROLLER.md: D-Bus service API documentation
- README-DEVELOPMENT.md: Development workflow documentation
- .gitignore: Updated with local build artifact patterns

These tools enable efficient local development without system-wide installation
and provide proper documentation for the D-Bus remote control capabilities.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

.gitignore

@@ -48,6 +48,16 @@ src/cthulhu/cthulhu_platform.py
 *.pyc
 __pycache__/
 
+# Local build directory and artifacts
+local-build/
+debug-*.out
+*.gmo
+*.pot
+
+# Translation files
+po/stamp-po
+po/insert-header.sed
+
 # /help
 /help/*.omf
 /help/*/*.page