WIP: Fix Electron build issues and migrate to @nostr/tools

- Fix TypeScript compilation errors in platform services
- Add missing rotateCamera method and isNativeApp property
- Fix index.html path resolution for packaged Electron apps
- Create separate Vite config for Electron renderer process
- Migrate from nostr-tools to @nostr/tools via JSR for ESM compatibility
- Update all Vite configs to handle mixed npm/JSR package management
- Add comprehensive documentation in BUILDING.md
- Fix preload script path resolution in packaged builds

Resolves build failures with deep imports and missing UI in AppImage.

src/services/platforms/WebPlatformService.ts

@@ -33,6 +33,7 @@ export class WebPlatformService implements PlatformService {
       isIOS: /iPad|iPhone|iPod/.test(navigator.userAgent),
       hasFileDownload: true,
       needsFileHandlingInstructions: false,
+      isNativeApp: false, // Web is not a native app
     };
   }
 
@@ -382,4 +383,13 @@ export class WebPlatformService implements PlatformService {
       .query(sql, params)
       .then((result: QueryExecResult[]) => result[0]?.values[0]);
   }
+
+  /**
+   * Rotates the camera between front and back cameras.
+   * @returns Promise that resolves when the camera is rotated
+   * @throws Error indicating camera rotation is not implemented in web platform
+   */
+  async rotateCamera(): Promise<void> {
+    throw new Error("Camera rotation not implemented in web platform");
+  }
 }