feat(lsp): cleanup autocmds on lsp detach

src/config/plugins/lsp.lua

@@ -23,16 +23,28 @@ local function default_on_attach(client, buffer)
   map("<leader>cr", vim.lsp.buf.rename, "[c]ode [r]ename")
   map("<leader>cd", vim.diagnostic.open_float, "[c]ode [d]iagnostic")
 
-  if client and client.server_capabilities.documentHighlightProvider then
+  if client and client.supports_method(vim.lsp.protocol.Methods.textDocument_documentHighlight) then
+    local highlight_augroup = vim.api.nvim_create_augroup("lsp-highlight", { clear = false })
+
     vim.api.nvim_create_autocmd({ "CursorHold", "CursorHoldI" }, {
       buffer = buffer,
+      group = highlight_augroup,
       callback = vim.lsp.buf.document_highlight,
     })
 
     vim.api.nvim_create_autocmd({ "CursorMoved", "CursorMovedI" }, {
       buffer = buffer,
+      group = highlight_augroup,
       callback = vim.lsp.buf.clear_references,
     })
+
+    vim.api.nvim_create_autocmd("LspDetach", {
+      group = vim.api.nvim_create_augroup("lsp-detach", { clear = true }),
+      callback = function(event)
+        vim.lsp.buf.clear_references()
+        vim.api.nvim_clear_autocmds({ group = "lsp-highlight", buffer = event.buf })
+      end,
+    })
   end
 end