feat: update angular to v19

- update dependencies
- fix sass deprecation warnings

Author: BGruenberg

.eslintrc.json

@@ -32,6 +32,9 @@
             "style": "kebab-case"
           }
         ],
+        "@angular-eslint/prefer-standalone": [
+          "off"
+        ],
         "semi": [
           "error",
           "always"

angular.json

@@ -53,7 +53,12 @@
             "stylePreprocessorOptions": {
               "includePaths": [
                 "."
-              ]
+              ],
+              "sass": {
+                "silenceDeprecations": [
+                  "import"
+                ]
+              }
             }
           },
           "configurations": {