Publish this extension in open-vsx extension repository

[rainbyte]

Summary

This extension could be included in open-vsx extension repository

Motivation

VSCode Marketplace is only available from Microsoft VSCode builds.

Code-OSS and VSCodium builds don't have access to Marketplace.

Every build, proprietary or open-source, can access open-vsx.

Alternatives

Extension could be loaded via VSIX file, but it is cumbersome.

Additional context

open-vsx extensions automatically appear in Code-OSS and VSCodium extension manager.

Linux distributions (eg. Arch Linux) package Code-OSS instead of VSCode.