Assign ownership to many libs files (#6928)

Assign ownership to many of the remaining libs/common files.

Criteria for ownership:
* Files used by a single team, is now owned by that team.
* Files related to a domain owned by a team is now owned by that team.
* Where ownership is unclear the "lowest level" service takes ownership.

libs/angular/src/platform/guard/feature-flag.guard.ts

@@ -0,0 +1,50 @@
+import { inject } from "@angular/core";
+import { CanActivateFn, Router } from "@angular/router";
+
+import { FeatureFlag } from "@bitwarden/common/enums/feature-flag.enum";
+import { ConfigServiceAbstraction } from "@bitwarden/common/platform/abstractions/config/config.service.abstraction";
+import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
+import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
+import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
+
+// Replace this with a type safe lookup of the feature flag values in PM-2282
+type FlagValue = boolean | number | string;
+
+/**
+ * Returns a CanActivateFn that checks if the feature flag is enabled. If not, it shows an "Access Denied!"
+ * toast and optionally redirects to the specified url.
+ * @param featureFlag - The feature flag to check
+ * @param requiredFlagValue - Optional value to the feature flag must be equal to, defaults to true
+ * @param redirectUrlOnDisabled - Optional url to redirect to if the feature flag is disabled
+ */
+export const canAccessFeature = (
+  featureFlag: FeatureFlag,
+  requiredFlagValue: FlagValue = true,
+  redirectUrlOnDisabled?: string
+): CanActivateFn => {
+  return async () => {
+    const configService = inject(ConfigServiceAbstraction);
+    const platformUtilsService = inject(PlatformUtilsService);
+    const router = inject(Router);
+    const i18nService = inject(I18nService);
+    const logService = inject(LogService);
+
+    try {
+      const flagValue = await configService.getFeatureFlag(featureFlag);
+
+      if (flagValue === requiredFlagValue) {
+        return true;
+      }
+
+      platformUtilsService.showToast("error", null, i18nService.t("accessDenied"));
+
+      if (redirectUrlOnDisabled != null) {
+        return router.createUrlTree([redirectUrlOnDisabled]);
+      }
+      return false;
+    } catch (e) {
+      logService.error(e);
+      return false;
+    }
+  };
+};