feat: replace vite with esbuild

.esbuild/server.ts

@@ -0,0 +1,25 @@
+import express from 'express';
+import cors from 'cors';
+import proxy from 'express-http-proxy';
+import { getBuildConfig } from './util.js';
+import { context } from 'esbuild';
+
+async function createServer() {
+  const app = express();
+  const config = getBuildConfig({ minify: false, core: false, entryName: 'mermaid' });
+  const ctx = await context(config);
+  ctx.watch();
+  let { host, port } = await ctx.serve({ servedir: './dist' });
+  app.use(cors());
+  app.use(express.static('./packages/mermaid/dist'));
+  app.use(express.static('./packages/mermaid-example-diagram/dist'));
+  app.use(express.static('demos'));
+  app.use(express.static('cypress/platform'));
+  app.use('/', proxy(`http://${host}:${port}`));
+
+  app.listen(9000, () => {
+    console.log(`Listening on http://localhost:9000`);
+  });
+}
+
+createServer();