Added Sweetpad extension

[yerx]

This PR adds the Sweetpad extension

• I have read the note above about PRs contributing or fixing extensions
• I have tried reaching out to the extension maintainers about publishing this extension to Open VSX (if not, please create an issue in the extension's repo using this template).
• This extension has an OSI-approved OSS license (we don't accept proprietary extensions in this repository)

Description

This adds the SweetPad extension.

This PR introduces adding the SweetPad extension change for making this extension available for use in other vscode based editors reason.