revert: update to Angular 20 and PrimeNG 20 (#1454)

Will be re-applied later.

Refs: 966ba8c

Author: CBenoit

webapp/.gitignore

@@ -38,7 +38,6 @@ web/.angular/cache
 /libpeerconnection.log
 npm-debug.log
 yarn-error.log
-pnpm-lock.yaml
 
 # MacOS
 .DS_Store

webapp/angular.json

@@ -53,6 +53,9 @@
             "styles": [
               "src/assets/css/main.scss",
               "node_modules/primeicons/primeicons.css",
+              "node_modules/primeng/resources/primeng.min.css",
+              "node_modules/primeflex/primeflex.scss",
+              "node_modules/@devolutions/icons/scss/devolutions-icons.scss",
               "node_modules/@angular/cdk/overlay-prebuilt.css"
             ],
             "scripts": [],

webapp/biome.json

@@ -53,4 +53,4 @@
       "quoteStyle": "single"
     }
   }
-}
+}