chore: Add workspace and IDE-specific folders to .gitignore

- Add .workspace/ to ignore generated workspace files
- Add .claude/ to ignore Claude Code IDE-specific files
- Add prj/ to ignore project-specific build artifacts
- These folders should be generated locally and not tracked in git

.gitignore

@@ -16,6 +16,11 @@ build/
 # Environment variables
 .env
 
+# Workspace and IDE-specific files
+.workspace/
+.claude/
+prj/
+
 CLAUDE.md
 Clean-EscapedBackticks.ps1
 Clean-MarkdownFiles.ps1