[auth] Make browser-based login the default

[byronkarlen]

Why

Now that we have many third party login users (without passwords), it should be easier for them to log in through eas-cli.

How

Added --no-browser option to keep existing functionality intact, and made the --browser option the default.
This is a potentially breaking change (although I suspect for very few users) so updated changelog as such.

Test Plan

Manually tested eas login, eas login --browser, eas login --no-browser

[byronkarlen]

• [auth] Make browser-based login the default #3746 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.99%. Comparing base (29909b2) to head (85ea594).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3746      +/-   ##
==========================================
+ Coverage   56.64%   56.99%   +0.36%     
==========================================
  Files         906      902       -4     
  Lines       39041    38874     -167     
  Branches     8154     8127      -27     
==========================================
+ Hits        22110    22154      +44     
+ Misses      15454    15263     -191     
+ Partials     1477     1457      -20     

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[byronkarlen]

(although I suspect for very few users)

I obviously can't prove this, and I could be totally wrong if some of our customers happened to be using odd workarounds for eas login in CI. Is this a potentially large enough change to warrant a changelog post or something else to help our users out if this breaks stuff? IMO a major version upgrade is clear about breaking changes but wanted to bring up in case.

[github-actions]

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[github-actions]

✅ Thank you for adding the changelog entry!