[eas-cli] eas go: use SDK version from current project when available

[gwdp]

Why

When running eas go in an Expo project, the SDK version is already specified in app.json or app.config.js, and the user likely wants to use that specific SDK version.

How

• Added detectProjectSdkVersionAsync which reads sdkVersion from the local Expo config via getPrivateExpoConfigAsync. Skips gracefully if no config file is present or the read fails.
• Uses the detected version as the default when --sdk-version is not passed.
• Logs "Current project using SDK X" (informational) when a version is detected and not overridden by the flag.
• Updated dispatchWorkflowAsync to return the server-resolved sdkVersion from the repack configuration response, and logs ✓ Using Expo Go SDK X after the server confirms the version is supported as a way to provide feedback on which version is being used.

Test Plan

• CI
• Local test within an Expo project using SDK 55 and 56

[gwdp]

• [eas-cli] eas go: prompt for SDK version interactively #3768
• [eas-cli] eas go: use SDK version from current project when available #3776 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.08%. Comparing base (fa6c877) to head (f9f5bbb).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3776      +/-   ##
==========================================
+ Coverage   56.80%   57.08%   +0.29%     
==========================================
  Files         904      905       +1     
  Lines       39112    39219     +107     
  Branches     8173     8198      +25     
==========================================
+ Hits        22214    22385     +171     
+ Misses      15428    15364      -64     
  Partials     1470     1470              

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[github-actions]

✅ Thank you for adding the changelog entry!

[github-actions]

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