fix(mobile): suppress Node.js url.parse() deprecation and document Apple session fix

- Add NODE_NO_WARNINGS=1 to all eas.json build profiles (development,
  preview, production) to suppress [DEP0169] url.parse() deprecation
  warnings emitted by EAS CLI when the build image's system Node is 22+
- Add NODE_NO_WARNINGS=1 env to both EAS Cloud Workflow jobs
  (.eas/workflows/create-builds.yml) with explanatory comments
- Fix outdated Node.js prerequisite in docs/MobileApp.md (was "18 or
  later", now "20.19.4 or later" with nvm guidance)
- Add troubleshooting sections in docs/MobileApp.md and mobile/README.md
  covering both the "Session expired Local session" error (Apple ID
  session expiry + App Store Connect API key recommendation) and the
  [DEP0169] Node.js deprecation warning

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

mobile/.eas/workflows/create-builds.yml

@@ -9,6 +9,10 @@ jobs:
   build_android:
     name: Build Android app
     type: build
+    env:
+      # Suppress Node.js url.parse() deprecation warnings ([DEP0169]) emitted by
+      # EAS CLI when running on the build image's system Node 22+.
+      NODE_NO_WARNINGS: "1"
     params:
       platform: android
       profile: production
@@ -16,6 +20,10 @@ jobs:
   build_ios:
     name: Build iOS app
     type: build
+    env:
+      # Suppress Node.js url.parse() deprecation warnings ([DEP0169]) emitted by
+      # EAS CLI when running on the build image's system Node 22+.
+      NODE_NO_WARNINGS: "1"
     params:
       platform: ios
       profile: production