chore: add flagOverviewRedesign flag (#8653)

https://linear.app/unleash/issue/2-2916/create-a-new-flag-for-the-new-feature-flag-overview-page-redesign

Adds the `flagOverviewRedesign` feature flag, allowing us to toggle the
new feature flag overview page redesign.

frontend/src/interfaces/uiConfig.ts

@@ -94,6 +94,7 @@ export type UiFlags = {
     'enterprise-payg'?: boolean;
     simplifyProjectOverview?: boolean;
     productivityReportEmail?: boolean;
+    flagOverviewRedesign?: boolean;
 };
 
 export interface IVersionInfo {

src/lib/types/experimental.ts

@@ -60,7 +60,8 @@ export type IFlagKey =
     | 'releasePlans'
     | 'productivityReportEmail'
     | 'enterprise-payg'
-    | 'simplifyProjectOverview';
+    | 'simplifyProjectOverview'
+    | 'flagOverviewRedesign';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
 
@@ -301,6 +302,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_SIMPLIFY_PROJECT_OVERVIEW,
         false,
     ),
+    flagOverviewRedesign: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_FLAG_OVERVIEW_REDESIGN,
+        false,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {

src/server-dev.ts

@@ -57,6 +57,7 @@ process.nextTick(async () => {
                         webhookDomainLogging: true,
                         releasePlans: false,
                         simplifyProjectOverview: true,
+                        flagOverviewRedesign: true,
                     },
                 },
                 authentication: {