add nixd config, remove unwanted servers

lua/crentist/lazy/lsp.lua

@@ -32,15 +32,8 @@ return {
             -- Replace the language servers listed here
             -- with the ones you want to install
             ensure_installed = {
-                'ts_ls',
                 'lua_ls',
-                'gopls',
-                'pylsp',
-                'gitlab_ci_ls',
                 'yamlls',
-                'ansiblels',
-                'terraformls',
-                'helm_ls',
             },
             handlers = {
                 function(server_name)
@@ -164,6 +157,34 @@ return {
         lspconfig.terraformls.setup {
             filetypes = { 'terraform', 'terraform-vars', 'tf' }
         }
+
+        -- Add additional capabilities supported by nvim-cmp
+        -- nvim hasn't added foldingRange to default capabilities, users must add it manually
+        local capabilities = require("cmp_nvim_lsp").default_capabilities()
+        capabilities = vim.lsp.protocol.make_client_capabilities()
+        capabilities.textDocument.foldingRange = {
+            dynamicRegistration = false,
+            lineFoldingOnly = true,
+        }
+
+        lspconfig.nixd.setup({
+            capabilities = capabilities,
+            settings = {
+                nixd = {
+                    nixpkgs = {
+                        expr = "import <nixpkgs> { }",
+                    },
+                    formatting = {
+                        command = { "alejandra" },
+                    },
+                    options = {
+                        home_manager = {
+                          expr = '(builtins.getFlake "~/.dotfiles/home-manager/").homeConfigurations.rtim.options',
+                        },
+                    },
+                }
+            },
+        })
     end
 }