feat: initialize warpbox.dev project structure and backend

Initialize the repository with the core Go backend architecture and a frontend mockup for warpbox.dev, a self-hosted file-sharing application.

- Set up Go backend modules for configuration, HTTP server, middleware, handlers, and templates.
- Add local development scripts, environment templates, and basic project configuration.
- Include a React-based frontend mockup under the docs directory.

docs/Mock-Up/Mockup Magic/vite.config.ts

@@ -0,0 +1,15 @@
+// @lovable.dev/vite-tanstack-config already includes the following — do NOT add them manually
+// or the app will break with duplicate plugins:
+//   - tanstackStart, viteReact, tailwindcss, tsConfigPaths, cloudflare (build-only),
+//     componentTagger (dev-only), VITE_* env injection, @ path alias, React/TanStack dedupe,
+//     error logger plugins, and sandbox detection (port/host/strictPort).
+// You can pass additional config via defineConfig({ vite: { ... } }) if needed.
+import { defineConfig } from "@lovable.dev/vite-tanstack-config";
+
+// Redirect TanStack Start's bundled server entry to src/server.ts (our SSR error wrapper).
+// @cloudflare/vite-plugin builds from this — wrangler.jsonc main alone is insufficient.
+export default defineConfig({
+  tanstackStart: {
+    server: { entry: "server" },
+  },
+});