fix: clean up README and add .gitignore

- Translate Quick Deploy section from Chinese to English
- Fix repo slug from my-skills to arkts_skills
- Add --skill flag usage examples for single skill install
- Update directory tree to match actual repo structure
- Add .gitignore for temp files, OS files, and editor files
- Remove junk temp files from working tree

.gitignore

@@ -0,0 +1,18 @@
+# Temp files
+*.tmp
+*.bak
+*~
+
+# OS files
+Thumbs.db
+Desktop.ini
+.DS_Store
+
+# Editor files
+.vscode/
+.idea/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?