Docs: Add Windows installation instructions for Auth0 CLI using PowerShell.

[deepu105]

🔧 Changes

• Docs: Add Windows installation instructions for Auth0 CLI using PowerShell.

  🔬 Testing

  📝 Checklist

  • [x] All new/changed/fixed functionality is covered by tests (or N/A)
  • [x] I have added documentation for all new/changed functionality (or N/A)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 72.29%. Comparing base (a26ccf1) to head (3e6d373). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1020 +/- ## ======================================= Coverage 72.29% 72.29% ======================================= Files 94 94 Lines 12758 12758 ======================================= Hits 9224 9224 Misses 2984 2984 Partials 550 550 ```

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