feat: add plantuml-lsp

[ptdewey]

Describe your changes

Add plantuml-lsp

Issue ticket number and link

Checklist before requesting a review

• I have successfully tested installation of the package.
• I have successfully tested the package after installation.
  

Screenshots

[mehalter]

Added some improvements to the package. One thing to note is we are putting in some rules regarding when packages become eligible (similar to nvim-lspconfig). We may need to wait until the project gains some more traction and gets more stars (goal is 100+) or when the project is merged into nvim-lspconfig

[ptdewey]

We may need to wait until the project gains some more traction and gets more stars (goal is 100+) or when the project is merged into nvim-lspconfig

This sounds reasonable to me, I didn't know about the lspconfig 100 star requirement until after I made this PR, so that is on me. It makes sense not to merge until I meet the requirements for merging there also.

[mehalter]

No worries at all! The requirements were a decision we have made today actually 😅 We are putting together a new maintainer team to help get these PRs processed more quickly and help with the longevity of the project and are discussing lots of things to make sure we can maintain the project well.

[ptdewey]

I was talking about the requirements for merging into nvim-lspconfig there, I hadn't checked them until after I made this PR, and my project definitely doesn't meet those requirements yet.