Cleanup

[iamcarbon]

• Updates remaining files to use file-scoped namespaces
• Removes unnecessary private setters
• Fixes various typos
• Cleans up tests a bit

There are no functional changes in this PR.

[iamcarbon]

@abergs Ready for review. Mostly just a quick cleanup round of nits when reviewing the codebase.

[codecov-commenter]

Codecov Report

Merging #417 (31a11b5) into master (e6567d3) will decrease coverage by 0.22%.
The diff coverage is 81.57%.

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@@            Coverage Diff             @@
##           master     #417      +/-   ##
==========================================
- Coverage   75.02%   74.80%   -0.22%     
==========================================
  Files          95       95              
  Lines        2751     2751              
  Branches      457      457              
==========================================
- Hits         2064     2058       -6     
- Misses        575      580       +5     
- Partials      112      113       +1     

Files Changed	Coverage Δ
Src/Fido2/AttestationFormat/AndroidKey.cs	95.23% <ø> (ø)
Src/Fido2/AuthenticatorAssertionResponse.cs	43.04% <ø> (ø)
Src/Fido2/AuthenticatorAttestationResponse.cs	76.37% <ø> (ø)
Src/Fido2/AuthenticatorResponse.cs	61.29% <0.00%> (ø)
Src/Fido2/CryptoUtils.cs	88.17% <ø> (ø)
Src/Fido2/Extensions/AuthDataHelper.cs	100.00% <ø> (ø)
Src/Fido2/Objects/CredentialPublicKey.cs	70.19% <ø> (ø)
Src/Fido2/AttestationFormat/Tpm.cs	94.62% <51.72%> (-5.02%)	⬇️
Src/Fido2/AttestationFormat/FidoU2f.cs	91.42% <91.42%> (ø)
Src/Fido2/Fido2NetLib.cs	91.66% <91.66%> (ø)
... and 4 more

... and 2 files with indirect coverage changes

[abergs]

Nice, merging!