Is it possible to add icons to specific folders at VIM Nerdtree or to get a structural overview of a clojure namespace like at cursive intellij ?
I'm not sure how cursive behaves. Are you talking about an overview of a single namespace or the entire src tree? For getting an overview of one namespace, I use https://github.com/hedyhli/outline.nvim which plays nice with clojure-lsp
For a project-wide view, I use codox and view it in the browser https://github.com/weavejester/codox
To see the symbols overview of the current namespace I call Clojure LSP which shows the results in aerial.nvim window. I've never tried nerdtree. I use Neo-tree which automatically adds icons to the tree view, based on the file type (I haven't felt the need to customise those icons). Neo-tree also shows git status.
• https://github.com/stevearc/oil.nvim: explore/edit your filesystem like a buffer • https://nvimdev.github.io/lspsaga/outline/ for namespace outline, but outline.nvim looks nice