Add .gitignore file to exclude unnecessary files and directories

.gitignore

@@ -0,0 +1,22 @@
+# Dependencies
+node_modules/
+
+# Logs
+*.log
+npm-debug.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor directories and files
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Coverage & test output
+coverage/
+
+# Pack artifacts
+*.tgz