refactor(share): use custom build plugin

packages/share-theme/scripts/esbuild-ejs-plugin.ts

@@ -0,0 +1,21 @@
+import { readFile } from 'fs/promises';
+import { compile } from 'ejs';
+
+export default function esbuildPluginEjs(options = {}) {
+  return {
+    name: 'ejs',
+    setup(build) {
+      build.onLoad({ filter: /\.ejs$/ }, async args => {
+        const template = await readFile(args.path, 'utf8')
+        const ejsOptions = {
+            ...options,
+            client: true,
+            strict: true,
+            compileDebug: false }
+        const generator = compile(template, ejsOptions)
+        const contents = `module.exports = ${generator.toString()};`
+        return { contents, loader: 'js' }
+      })
+    }
+  }
+}