feat: Add support for vala-lint

[edwood-grant]

Description

A good potential tool integration on this plugin is the vala-lint code style checker tool.

https://github.com/vala-lang/vala-lint

This provides fixes and warning according to elementary OS code style, but also keeps a simple way to modify/ignore files with a vala-lint.conf file

Possible Solutions

Since this is a command line tool should be possible to call if if it exists and parse whatever is needed as errors /warnings and feed jetbrains for it. A similar workflow for what the lsp does I assume.

Additional Info

I don't think this as a super necessary tool for now (I'm sure there are more pressing matters) but just to keep it here as a potential additional tool.

[Tbusk]

Hi @edwood-grant , great suggestion. I'll think about how best to accomplish this, and keep this issue updated.