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/wrangler.jsonc

@@ -0,0 +1,7 @@
+{
+  "$schema": "node_modules/wrangler/config-schema.json",
+  "name": "tanstack-start-app",
+  "compatibility_date": "2025-09-24",
+  "compatibility_flags": ["nodejs_compat"],
+  "main": "src/server.ts",
+}