fix(ios): set IPHONEOS_DEPLOYMENT_TARGET to 15.0 across all packages

[just1and0]

Summary

• Updates IPHONEOS_DEPLOYMENT_TARGET from 10.0 to 15.0 in all 16 package pbxproj files and the _TEMPLATE_ pbxproj

• Aligns with the iosTarget: "15.0" already declared in packages/app/package.json sdkVersions

• Prevents new packages generated from the template from reintroducing the stale 10.0 value

• Fixes this @available annotation shouldn't be necessary unless the pbxproj IPHONEOS_DEPLOYMENT_TARGET is wrong #8882

Test plan

• Verified zero IPHONEOS_DEPLOYMENT_TARGET = 10.0 values remain across all pbxproj files
• git diff --check clean — no whitespace issues
• CI iOS build passes

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.11%. Comparing base (3bbfecc) to head (b282e60).

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #9108      +/-   ##
============================================
- Coverage     65.14%   65.11%   -0.02%     
  Complexity     1833     1833              
============================================
  Files           503      503              
  Lines         39184    39184              
  Branches       5805     5776      -29     
============================================
- Hits          25521    25510      -11     
- Misses        12192    12242      +50     
+ Partials       1471     1432      -39     

Flag	Coverage Δ
android-native	60.52% <ø> (ø)
e2e-ts-android	58.21% <ø> (ø)
e2e-ts-ios	62.74% <ø> (-0.05%)	⬇️
e2e-ts-macos	50.01% <ø> (ø)
ios-native	62.74% <ø> (-0.05%)	⬇️
jest	49.58% <ø> (ø)

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[mikehardy]

this is a good change as a start - can you add a cleanup chore commit that scans the entire ios codebase and cleans up any stale API availability checks that were looking for iOS 15 or below?

If there is a similar requirement that we're past for tvos/visionos/ipados/maccatalyst etc - that is, a deployment target that's stale and could be updated so the compiler knows more APIs are available - allowing us to clean out availability gates for those platforms, it would be good to get everything at once while we're here