Add BoldSign custom connector

[mohanravi07]

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[mohanravi07]

@microsoft-github-policy-service agree company="Syncfusion, Inc."

[vmanoharas]

Hello @mohanravi07

Please resolve review comments.

[mohanravi07]

Hi @vmanoharas, Sorry for the delay. Somehow, I missed this. I have now addressed the comments. Please take another look at this and let me know if you have any concerns.

[vmanoharas]

Hello @mohanravi07
I hope you are doing well.
Congratulations, your pull request is approved and merged. Please submit the files to Connector certification portal or update your submission using your latest commit ID, please allow us up to 1-2 weeks to review your submission, and our Engineers will notify you in the “Activity Control” area in Connector certification portal . Please make sure that the icon meets all the requirements, that it’s size is 230x230, icon background is not white or transparent and it matches the iconBrandColor property in apiProperties.json file.
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