feat(admin): Improve DX for deploying admin externally (#3418)

* init deploy command

* add include flag

* add 'shortcut' flag

* add dev command, fix var replacement, change default behaviour

* cleanup params of build command

* fix defaults when using the plugin to serve admin

* add changeset

* fix globals

* update README

* throw error on no build found

---------

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/admin-ui/src/index.ts

@@ -1,8 +1,10 @@
+import dns from "dns"
 import fse from "fs-extra"
 import { resolve } from "path"
 import vite from "vite"
 import { AdminBuildConfig } from "./types"
-import { getCustomViteConfig } from "./utils"
+import { AdminDevConfig } from "./types/dev"
+import { getCustomViteConfig, getCustomViteDevConfig } from "./utils"
 
 async function build(options?: AdminBuildConfig) {
   const config = getCustomViteConfig(options)
@@ -25,4 +27,16 @@ async function clean() {
   throw new Error("Not implemented")
 }
 
-export { build, watch, clean }
+async function dev(options: AdminDevConfig) {
+  // Resolve localhost for Node v16 and older.
+  // @see https://vitejs.dev/config/server-options.html#server-host.
+  dns.setDefaultResultOrder("verbatim")
+
+  const server = await vite.createServer(getCustomViteDevConfig(options))
+  await server.listen()
+
+  server.printUrls()
+}
+
+export { build, dev, watch, clean }
+export type { AdminBuildConfig, AdminDevConfig }