refactor: migrate to angular esbuild

refactor: migrate to ionic standalone components
refactor: migrate ion icons to a custom element

frontend/app/tsconfig.app.json

@@ -3,6 +3,6 @@
   "compilerOptions": {
     "outDir": "../out-tsc/app"
   },
-  "files": ["src/main.ts"],
+  "files": ["src/main.ts", "src/ion-icons.ts"],
   "include": ["src/**/*.d.ts"]
 }