Fix heredoc bug in gcc_init.sh and add .gitignore

- Fix: $(date) was not interpolating inside single-quoted heredoc in
  commit.md generation. Extracted to variable before heredoc block.
- Add .gitignore excluding .GCC/ directory, ROADMAP.md, and OS/editor files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: faugustdev

.gitignore

@@ -0,0 +1,17 @@
+# GCC memory directory - should not be committed
+# Each user/agent generates their own context
+.GCC/
+
+# Internal planning
+ROADMAP.md
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor files
+*.swp
+*.swo
+*~
+.vscode/
+.idea/

scripts/gcc_init.sh

@@ -41,11 +41,12 @@ dependencies: []
 EOF
 
 # Create initial commit.md
-cat > "$GCC_DIR/commit.md" << 'EOF'
+INIT_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+cat > "$GCC_DIR/commit.md" << EOF
 # Commit History
 
 ## [INIT] Project initialized
-- **Date**: $(date -u +"%Y-%m-%dT%H:%M:%SZ")
+- **Date**: $INIT_DATE
 - **Branch**: main
 - **Summary**: GCC memory system initialized.
 EOF