Add LSP and formatter support for .astro language. (Or add feature to add custom languages)

[angelblackcoat]

Check for existing issues

• Completed

Describe the feature

.astro is language for Astro framework.

After 1.12.0 update, text in .astro file only becomes gray.

Additionally, it's won't auto close tags anymore.
Out of the box support for Astro will be very much appreciated.

Thank you for your hard work.

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[bajrangCoder]

We'll add out of the box support for astro.

Btw a plugin can add custom language support , lsp , formatters etc