build: simplify build & run process of FE files

use external bun packages to bundle files, run this package in the
build.rs script

.devfiles/scripts/build-frontend.ts

@@ -1,20 +0,0 @@
-import sassPlugin from "@alecodes/bun-plugin-sass";
-
-const entrypoints = Array.from(
-	new Bun.Glob("frontend/**/*.html").scanSync("."),
-);
-
-const result = await Bun.build({
-	entrypoints,
-	outdir: "dist",
-	publicPath: "/",
-	splitting: true,
-	plugins: [sassPlugin],
-	naming: {
-		entry: "[dir]/[name].[ext]",
-		chunk: "assets/[name]-[hash].[ext]",
-		asset: "assets/[name]-[hash].[ext]",
-	},
-});
-
-console.log("Assets compiled!");