feat: CreateJWT use ES256KSigner

[curtis-h]

Description:

Using the ES256KSigner exported by did-jwt library instead of the custom untested DER code

Checklist:

• My PR follows the contribution guidelines of this project
• My PR is free of third-party dependencies that don't comply with the Allowlist
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked the PR title to follow the conventional commit specification

[coveralls]

Pull Request Test Coverage Report for Build 14614757852

Details

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 76.383%

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Totals
Change from base Build 14595063837:	0.2%
Covered Lines:	3418
Relevant Lines:	4277

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💛 - Coveralls