fix: rename total to count in AIBridgeListInterceptionsResponse (#20410)

Thanks to the great work in #20393, we’ve successfully introduced
offset-based pagination for this endpoint. However, the frontend expects
a `count` field in the response rather than `total`. This PR updates the
response payload to rename the returned key to `count` for consistency
with frontend expectations and existing API patterns.

This is necessary to unblock the work in #20331

site/src/api/typesGenerated.ts

@@ -39,7 +39,7 @@ export interface AIBridgeInterception {
 
 // From codersdk/aibridge.go
 export interface AIBridgeListInterceptionsResponse {
-	readonly total: number;
+	readonly count: number;
 	readonly results: readonly AIBridgeInterception[];
 }