add support for Lsp codelens

[jan-xyz]

code lenses are currently highlighted with the default color. This change adjusts it to make it less visually intrusive like comments. docs: https://neovim.io/doc/user/lsp.html#hl-LspCodeLens

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It is based on the VS code highlighting:

[arcticicestudio]

Hi @jan-xyz :wave:, thanks for your contribution :+1: I'll try to test and review the changes this weekend.

[jan-xyz]

Done! :) Thanks for the feedback! Would you appreciate another PR that moves other Comments to the custom group as well?

[jan-xyz]

hey @arcticicestudio, any news on getting this merged? 😊

[jan-xyz]

No need to apologize! I appreciate consistent behavior and as this is something new I totally understand that you haven't figured out and planned all of the quirks and bits yet! I'll see to it soon and I hope you had a great digital free vacation 🤗

[jan-xyz]

@arcticicestudio I applied your requested changes

[svengreb]

Release Note Assets

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