fix: change @namespace and add @annotation highlight

[mikesmithgh]

I am running Neovim with nvim-jdtls for LSP support in my Java development. When I have the LSP client attached, I noticed the imports statement syntax highlighting looked off.

See screenshot below (Left is @namespace Include and Right is @namespace GruvboxFg1)

I sampled a couple colorschemes: everforest, github_dark, and rosepine. It seems like @namespace is normally mapped to the same highlight as @variable or @variable.builtin. I just personally liked the look of @variable more so I mapped it to GruvboxFg1. For annotation I mapped it to Operator so it would have the same coloring as the @ symbol.

'@namespace' and '@annotation' appear to be coming from the language server: https://github.com/eclipse/eclipse.jdt.ls/blob/master/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/semantictokens/TokenType.java

Please let me know if you need any additional info. Enjoying the coloscheme in Lua 🙂

[ellisonleao]

thanks @mikesmithgh !