Bump zod dependency to v4 for packages using configSchema

These packages use `configSchema` with `zod/v4` imports and require the
full Zod v4 package for JSON Schema support. The dependency range is
narrowed from `^3.25.76 || ^4.0.0` to `^4.0.0`.

Also adds a `.patches` entry for the patch release.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

plugins/search-react/package.json

@@ -70,7 +70,7 @@
     "qs": "^6.9.4",
     "react-use": "^17.3.2",
     "uuid": "^11.0.2",
-    "zod": "^3.25.76 || ^4.0.0"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",