[PM-17031] Create UI-common (#12831)

Extract core functionality from `libs/angular` to allow teams to depend on `libs/ui-common` instead.

Moves the following functionality to `ui-common`.
- `I18nPipe`. `libs/angular` still has an old copy but `components` depends on the new variant from `ui-common`.
- `safeProvider`, `SafeProvider` and `SafeInjectionToken`. `libs/angular`re-exports these to avoid needing to update all consumers.

libs/ui/common/src/i18n.pipe.ts

@@ -0,0 +1,24 @@
+import { Pipe, PipeTransform } from "@angular/core";
+
+import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
+
+/**
+ * Localizes the specified string.
+ *
+ * @example
+ * {{ 'key' | i18n }}
+ *
+ * @example
+ * {{ 'key' | i18n: 'param1' }}
+ */
+@Pipe({
+  name: "i18n",
+  standalone: true,
+})
+export class I18nPipe implements PipeTransform {
+  constructor(private i18nService: I18nService) {}
+
+  transform(id: string, p1?: string, p2?: string, p3?: string): string {
+    return this.i18nService.t(id, p1, p2, p3);
+  }
+}