fix(build): reference the iOS LocationEssentials typings

@nativescript/types-ios v9 moved CLLocation, CLLocationCoordinate2D and
CLLocationCoordinate2DMake out of objc!CoreLocation.d.ts into
objc!_LocationEssentials.d.ts, which nothing referenced. Without it
`nx build geolocation` fails with 8 "Cannot find name 'CLLocation'"
errors.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: NathanWalker

references.d.ts

@@ -2,6 +2,7 @@
 /// <reference path="./node_modules/@nativescript/types-android/lib/android-33.d.ts" />
 /// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!AudioToolbox.d.ts" />
 /// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!CoreLocation.d.ts" />
+/// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!_LocationEssentials.d.ts" />
 /// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!Darwin.d.ts" />
 /// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!Security.d.ts" />
 /// <reference path="./node_modules/@nativescript/types-ios/lib/ios/objc-x86_64/objc!AuthenticationServices.d.ts" />