feat: cue language server

lua/lspconfig/configs/cue.lua

@@ -0,0 +1,24 @@
+local util = require 'lspconfig.util'
+
+local root_files = {
+  'cue.mod',
+  '.git',
+}
+
+return {
+  default_config = {
+    cmd = { 'cue', 'lsp' },
+    filetypes = { 'cue' },
+    root_dir = function(fname)
+      return util.root_pattern(unpack(root_files))(fname)
+    end,
+    single_file_support = true,
+  },
+  docs = {
+    description = [[
+https://github.com/cue-lang/cue
+
+CUE makes it easy to validate data, write schemas, and ensure configurations align with policies.
+]],
+  },
+}