[ui] switch back from yarn pnp as it's a huge hassle

ui/.gitignore

@@ -1,3 +1,5 @@
+node_modules
+
 /public/build/
 /public/vendor/
 

ui/.yarnrc.yml

@@ -1 +1,3 @@
+nodeLinker: node-modules
+
 yarnPath: .yarn/releases/yarn-3.1.0.cjs

ui/rollup.config.js

@@ -11,10 +11,6 @@ import typescript from "@rollup/plugin-typescript";
 import css from "rollup-plugin-css-only";
 import dev from "rollup-plugin-dev";
 
-import pnpapi from "pnpapi";
-import { PosixFS, ZipOpenFS } from "@yarnpkg/fslib";
-import libzip from "@yarnpkg/libzip";
-
 const production = !process.env.ROLLUP_WATCH;
 
 export default {
@@ -33,16 +29,6 @@ export default {
     svelte({
       preprocess: sveltePreprocess({
         sourceMap: !production,
-        // https://github.com/sveltejs/svelte-preprocess/issues/283#issuecomment-748480431
-        scss: {
-          importer: (url, prev, done) => {
-            const zipOpenFs = new ZipOpenFS({ libzip: libzip.getLibzipSync() });
-            const crossFs = new PosixFS(zipOpenFs);
-            const res = pnpapi.resolveRequest(url, __dirname + "/");
-            const file = crossFs.readFileSync(res);
-            done({ contents: file.toString() });
-          },
-        },
       }),
       compilerOptions: {
         // enable run-time checks when not in production