Refactor desktop app into separate client and proxy apps

apps/yaak-client/postcss.config.cjs

@@ -0,0 +1,7 @@
+module.exports = {
+  plugins: [
+    require('@tailwindcss/nesting')(require('postcss-nesting')),
+    require('tailwindcss'),
+    require('autoprefixer'),
+  ]
+}