chore: remove unused react-native-config-reader

The only consumer was `isOfficial = RNConfigReader.IS_OFFICIAL`, deleted in
#7322 (remove Experimental code paths) along with the `official` product
flavor that produced the `IS_OFFICIAL` BuildConfig field (#7325). Since then
the package has had zero JS imports — it was autolinked dead weight.

Removes:
- the dependency and its @types
- the ambient `declare module` in externalModules.d.ts
- the orphaned iOS podspec patch (patch-package was erroring on it)
- the `rn_config_reader_custom_package` resValue in build.gradle, which only
  the now-removed native module read

Verified: pnpm install + patch-package clean, tsc passes.

Author: diegolmello

android/app/build.gradle

@@ -93,7 +93,6 @@ android {
         versionName "4.74.0"
         vectorDrawables.useSupportLibrary = true
         manifestPlaceholders = [BugsnagAPIKey: BugsnagAPIKey as String]
-        resValue "string", "rn_config_reader_custom_package", "chat.rocket.reactnative"
     }
 
     signingConfigs {

app/externalModules.d.ts

@@ -1,6 +1,5 @@
 declare module 'remove-markdown';
 declare module '@rocket.chat/sdk';
-declare module 'react-native-config-reader';
 declare module 'react-native-mime-types';
 declare module 'react-native-restart';
 declare module 'react-native-math-view';

package.json

@@ -92,7 +92,6 @@
 		"react-native-background-timer": "2.4.1",
 		"react-native-bootsplash": "^6.3.8",
 		"react-native-callkeep": "4.3.16",
-		"react-native-config-reader": "4.1.1",
 		"react-native-console-time-polyfill": "1.2.3",
 		"react-native-device-info": "11.1.0",
 		"react-native-easy-grid": "0.2.2",
@@ -189,7 +188,6 @@
 		"@types/lodash": "^4.14.188",
 		"@types/react": "~19.1.0",
 		"@types/react-native-background-timer": "^2.0.2",
-		"@types/react-native-config-reader": "^4.1.3",
 		"@types/semver": "7.3.13",
 		"@types/ua-parser-js": "^0.7.36",
 		"@types/url-parse": "^1.4.8",