chore: initial project scaffold

Sets up monorepo with Wails desktop shell, Go backend, React/TS frontend, and Kotlin Android SDK skeleton.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,53 @@
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+._*
+.Spotlight-V100
+.Trashes
+
+# Windows
+Thumbs.db
+ehthumbs.db
+Desktop.ini
+$RECYCLE.BIN/
+
+# Go
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+vendor/
+go.sum.bak
+
+# Node / frontend
+node_modules/
+dist/
+build/
+.vite/
+*.local
+.env
+.env.*
+!.env.example
+
+# Wails build output
+desktop/build/bin/
+desktop/frontend/dist/
+
+# Android
+*.iml
+.gradle/
+local.properties
+.idea/
+*.keystore
+*.jks
+android-sdk/build/
+android-sdk/.gradle/
+android-sdk/app/build/
+android-sdk/**/build/
+
+# Go workspace
+go.work.sum