WIP: feat: dev command with minimal template and dev server

[dswbx]

This PR adds a command (npx bknd dev) which scaffolds/updates a directory for a minimal React SPA with bknd (API and Admin UI). The goal is to expose as little files as possible, specifically targeting LLMs to reduce context overhead.

├── .bknd
├── src
│   ├── App.tsx
│   ├── api.ts (optional)
│   ├── listeners.ts (optional)
│   ├── schema.ts (optional)
│   └── styles.css
└── tsconfig.json

This will configure bknd in code mode, a vite dev server with @cloudflare/vite-plugin, tailwind, and makes it ready to be deployed to cloudflare.

// App.tsx
import "./styles.css";

export default function App() {
   return <div>Hello World</div>;
}

// schema.ts
import { em, entity, text, boolean, number, datetime, json, jsonSchema, enumm } from "bknd";

export default em({
   // todos: entity("todos", {
   //    title: text(),
   //    done: boolean(),
   // }),
});

// api.ts
import { Hono } from "hono";
import type { ServerEnv } from "bknd";

export default new Hono<ServerEnv>().get("/", (c) => {
   // const app = c.var.app;
   // const api = app.getApi();
   return c.json({ message: "Hello, world!" });
});

// listeners.ts
import { AppEvents, DatabaseEvents, type EventManager } from "bknd";

export default function (emgr: EventManager) {
   // emgr.onEvent(AppEvents.AppRequest, async (event) => {
   //    console.log("Request received", event.params.request.url);
   // });
}