chore(repo): establish isolated mobile repository and upstream audit

.gitignore

@@ -0,0 +1,20 @@
+.DS_Store
+.idea/
+.gradle/
+**/build/
+local.properties
+*.keystore
+*.jks
+*.p12
+*.mobileprovision
+.env
+.env.*
+DerivedData/
+*.xcuserstate
+xcuserdata/
+ios/Yuvomi.xcodeproj/
+.swiftpm/
+.build/
+artifacts/
+__pycache__/
+node_modules/