Upgrades Angular 14 to 15 (merging angular-update into dev; incorporates new features, bug fixes of the dev branch) (WEB-73)

Merges the angular-update branch into dev, upgrading the application from Angular 14 to Angular 15 and integrating improvements made since the 1.0.0 release.

Key Highlights:

- Migrates the entire codebase from Angular 14 to Angular 15 to ensure compatibility with the latest tooling, improved performance, and long-term support.
- Replaces all deprecated MatLegacy* components with their modern Angular Material equivalents.
- Fully removes the @angular/flex-layout dependency and all related usage from the codebase.
- Includes various new features and bug fixes introduced after the 1.0.0 release.

Author: gkbishnoi07

.browserslistrc

@@ -6,5 +6,7 @@ last 2 versions
 > 0.5%
 Firefox ESR
 not dead
+not kaios 2.5
+not op_mini all
 # For IE 9-11 support, please uncomment the next line and adjust as needed
 # IE 9-11

angular.json

@@ -232,5 +232,13 @@
     "schematicCollections": [
       "@angular-eslint/schematics"
     ]
+  },
+  "schematics": {
+    "@angular-eslint/schematics:application": {
+      "setParserOptionsProject": true
+    },
+    "@angular-eslint/schematics:library": {
+      "setParserOptionsProject": true
+    }
   }
 }