AuthenticatorSelection Default to discourage UV

[abergs]

This PR modifies the default AuthenticatorSelection configuration to discourage User Verification (UV). This change aims to improve the overall user experience for most applications where UV isn't a critical security requirement.

Rationale

• Most applications don't require User Verification during signing operations
• Disabling UV by default reduces friction in the authentication flow
• Applications that need UV can still explicitly enable it

Discussion Points

I'd appreciate community feedback on this change, particularly regarding:

• Security implications
• User experience trade-offs
• Specific use cases where this might be problematic

CC: @aseigler @iamcarbon @joegoldman2

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.72%. Comparing base (e687bc6) to head (fa9a488).

Files with missing lines	Patch %	Lines
Src/Fido2.Models/CredentialCreateOptions.cs	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #564   +/-   ##
=======================================
  Coverage   74.72%   74.72%           
=======================================
  Files         103      103           
  Lines        2730     2730           
  Branches      464      464           
=======================================
  Hits         2040     2040           
  Misses        581      581           
  Partials      109      109           

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