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- Fix outdated Node.js prerequisite in docs/MobileApp.md (was "18 or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.json

@@ -8,6 +8,9 @@
       "developmentClient": true,
       "distribution": "internal",
       "node": "20.19.4",
+      "env": {
+        "NODE_NO_WARNINGS": "1"
+      },
       "ios": {
         "image": "macos-sequoia-15.5-xcode-26.0"
       }
@@ -15,6 +18,9 @@
     "preview": {
       "distribution": "internal",
       "node": "20.19.4",
+      "env": {
+        "NODE_NO_WARNINGS": "1"
+      },
       "ios": {
         "simulator": false,
         "image": "macos-sequoia-15.5-xcode-26.0"
@@ -23,6 +29,9 @@
     "production": {
       "autoIncrement": true,
       "node": "20.19.4",
+      "env": {
+        "NODE_NO_WARNINGS": "1"
+      },
       "ios": {
         "image": "macos-sequoia-15.5-xcode-26.0"
       }