refactor(assets): convert asset management scripts to TypeScript with tsx

- Replace JavaScript asset scripts with TypeScript equivalents
- Install tsx for direct TypeScript execution without compilation
- Add proper TypeScript interfaces for AssetConfig and validation
- Update package.json scripts to use tsx instead of node
- Remove old JavaScript files (assets-config.js, assets-validator.js)
- Maintain all existing functionality while improving type safety
- Fix module syntax issues that caused build failures on macOS

Scripts affected:
- assets:config: node → tsx scripts/assets-config.ts
- assets:validate: node → tsx scripts/assets-validator.ts

Benefits:
- Eliminates CommonJS/ES module syntax conflicts
- Provides better type safety and IntelliSense
- Modernizes development tooling
- Ensures cross-platform compatibility

config/assets/capacitor-assets.config.json

@@ -1,10 +1,9 @@
 {
   "icon": {
-    "source": "resources/icon.png",
     "android": {
       "adaptive": {
-        "foreground": "resources/icon.png",
         "background": "#121212",
+        "foreground": "resources/icon.png",
         "monochrome": "resources/icon.png"
       },
       "target": "android/app/src/main/res"
@@ -13,20 +12,21 @@
       "padding": 0,
       "target": "ios/App/App/Assets.xcassets/AppIcon.appiconset"
     },
+    "source": "resources/icon.png",
     "web": {
       "target": "public/img/icons"
     }
   },
   "splash": {
-    "source": "resources/splash.png",
-    "darkSource": "resources/splash_dark.png",
     "android": {
       "scale": "cover",
       "target": "android/app/src/main/res"
     },
+    "darkSource": "resources/splash_dark.png",
     "ios": {
-      "useStoryBoard": true,
-      "target": "ios/App/App/Assets.xcassets"
-    }
+      "target": "ios/App/App/Assets.xcassets",
+      "useStoryBoard": true
+    },
+    "source": "resources/splash.png"
   }
 }