Angular 15 (#1764)

* Updated ngx-virtual-scroller

* Removed the karma test config as it's breaking migration

* Reverted to pre angular 15

* Upgraded packages and reverted target to ES6 for older devices

* It's broken. Need to also find the safari version for old Ipads

* Fixes some code in default pipe and many updates to packages. Removed support for old iOS versions as it restricted Kavita from using newer features. Build still broken.

* More progress in getting build working on Angular 15. Removed polyfills.ts for new angular config

* Remove all.css for icons and use scss instead

* Removed stuff that isn't needed

* Migrated extended linting to eslint, ran on project and updated issues. Removed a duplicate component that did nothing. Fixed a few places where lifecycle hooks werent being called as interface wasn't implemented.

* App builds correctly. Source maps are still needed.

* Fixed source maps and removed more testing stuff. I will re-add later in another release when I figure out how to properly tackle dependencies on backend.

* Reverted back to old source map definition

UI/Web/tsconfig.app.json

@@ -3,11 +3,12 @@
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "./out-tsc/app",
-    "types": []
+    "types": [
+      "@angular/localize"
+    ]
   },
   "files": [
     "src/main.ts",
-    "src/polyfills.ts"
   ],
   "include": [
     "src/**/*.d.ts"