Initial commit: bface library, build fixes, and refreshed docs

- Externalize all @tamagui/* and tamagui subpaths so dist no longer vendors Tamagui.
- Emit TypeScript declarations with vite-plugin-dts; fix package exports types for ui/*.
- Align initEnv with profiles: displayName, brandLogo, api.baseURL, themeColor, uiShell.
- Stabilize tests with Node localStorage file; env tests pass.
- Update README and component docs for services, menus, API client, and development.

src/index.js

@@ -0,0 +1,22 @@
+/**
+ * BUI Library Entry Point
+ * Base UI and Platform library
+ */
+
+// Re-export platform modules
+export * from './platform/api.js';
+export * from './platform/compat.js';
+export * from './platform/env.js';
+export * from './platform/menu.js';
+export * from './platform/storage.js';
+export * from './platform/sw-register.js';
+export * from './data/index.js';
+
+// Re-export UI components
+export * from './ui/App.jsx';
+export * from './ui/components/index.js';
+export * from './ui/runtime/general-settings.js';
+
+// Re-export security modules
+export * from './security/index.js';
+