Add .gitignore file

- Ignore IDE configuration files (.cursorindexingignore, .cursor/, .vscode/)
- Ignore development tools (.specstory/)
- Ignore OS generated files (.DS_Store, Thumbs.db, etc.)
- Ignore temporary files

Author: eferro

.gitignore

@@ -0,0 +1,21 @@
+# IDE and Editor Configuration
+.cursorindexingignore
+.cursor/
+.vscode/
+
+# Development Tools
+.specstory/
+
+# OS Generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.temp
+*~