[TRI-1426] : Improve the Resend integration documentation

[Rutam21]

Closes #661

✅ Checklist

• I have followed every step in the contributing guide
• The PR title follows the convention.
• I ran and tested the docs site and it works properly.

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Testing

I locally deployed the Docs Website using Netlify and verified all the changes.

Video Snapshot

Resend.mp4

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Changelog

The Resend Documentation has been updated such that it follows the same format as the GitHub Integration.

Resend Documentation is now divided into two sections.

• Resend Overview and Authentication
• Resend tasks

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Screenshots

Overview and Authentication Page

Tasks Page

[changeset-bot]

⚠️ No Changeset found

Latest commit: 8004943

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[Rutam21]

This PR exactly follows the GitHub Integration format.

• An overview section has been added based on the official Resend Site.
• Both the Overview and Tasks pages have been separated properly.
• Comments have been added to all the code blocks for better understanding.

Please review and suggest changes, if any. Thanks.

cc: @D-K-P

[D-K-P]

Nice. Same feedback as SendGrid @Rutam21

[Rutam21]

@D-K-P I have included the changes suggested by you. Please review. Thanks.

[Rutam21]

@D-K-P I believe this PR is now ready for merge. Thanks.