Added logo_url and show_nylas_branding options and ability to turn off Nylas branding

[ajay-k]

Added support for two missing fields (logo_url & showNylasBranding ) in the EmailTemplate class that were documented in the Scheduler API Reference but not implemented in the Java/Kotlin SDK.

• Added proper JSON serialization with "Json" annotations ("logo", "show_nylas_branding")
• Maintained backward compatibility - all new fields are optional
• Included in Changelog

License

I confirm that this contribution is made under the terms of the MIT license and that I have the authority necessary to make this contribution on behalf of its copyright owner.

[AaronDDM]

@ajay-k can we update another test to show how it is being used for the actual API call?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.57%. Comparing base (d47b137) to head (a6ca51b).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #283   +/-   ##
=========================================
  Coverage     80.57%   80.57%           
  Complexity      333      333           
=========================================
  Files            36       36           
  Lines          1014     1014           
  Branches         88       88           
=========================================
  Hits            817      817           
  Misses          138      138           
  Partials         59       59           

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[ajay-k]

@ajay-k can we update another test to show how it is being used for the actual API call?

Yeah, looking into this