Add verify2

[maxkahan]

This PR adds Verify V2 functionality to the SDK.

This includes

• The v2 implementation for all channels
• Bring your own pin
• Fraud_check
• Cancel request

[codecov-commenter]

Codecov Report

Merging #254 (d62f157) into main (99b9635) will decrease coverage by 0.27%.
The diff coverage is 94.20%.

❗ Current head d62f157 differs from pull request most recent head 5921e4e. Consider uploading reports for the commit 5921e4e to get more accurate results

@@            Coverage Diff             @@
##             main     #254      +/-   ##
==========================================
- Coverage   97.28%   97.01%   -0.27%     
==========================================
  Files          20       21       +1     
  Lines         737      805      +68     
==========================================
+ Hits          717      781      +64     
- Misses         20       24       +4     

Impacted Files	Coverage Δ
src/vonage/verify.py	100.00% <ø> (ø)
src/vonage/client.py	94.38% <50.00%> (-1.91%)	⬇️
src/vonage/errors.py	100.00% <100.00%> (ø)
src/vonage/verify2.py	100.00% <100.00%> (ø)

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[maxkahan]

Have added BYOP to this PR