[EC-473] Add feature flags to common code (#3324)

apps/cli/src/flags.ts

@@ -1,5 +1,27 @@
-// Remove this linter hint if any flags exist
-// eslint-disable-next-line @typescript-eslint/ban-types
-export type Flags = {};
+import {
+  flagEnabled as baseFlagEnabled,
+  devFlagEnabled as baseDevFlagEnabled,
+  devFlagValue as baseDevFlagValue,
+  SharedFlags,
+  SharedDevFlags,
+} from "@bitwarden/common/misc/flags";
 
-export type FlagName = keyof Flags;
+// required to avoid linting errors when there are no flags
+/* eslint-disable-next-line @typescript-eslint/ban-types */
+export type Flags = {} & SharedFlags;
+
+// required to avoid linting errors when there are no flags
+/* eslint-disable-next-line @typescript-eslint/ban-types */
+export type DevFlags = {} & SharedDevFlags;
+
+export function flagEnabled(flag: keyof Flags): boolean {
+  return baseFlagEnabled<Flags>(flag);
+}
+
+export function devFlagEnabled(flag: keyof DevFlags) {
+  return baseDevFlagEnabled<DevFlags>(flag);
+}
+
+export function devFlagValue(flag: keyof DevFlags) {
+  return baseDevFlagValue(flag);
+}