feat: add bzl lsp

lua/lspconfig/server_configurations/bzl.lua

@@ -0,0 +1,22 @@
+local util = require 'lspconfig.util'
+
+return {
+  default_config = {
+    cmd = { 'bzl', 'lsp', 'serve' },
+    filetypes = { 'bzl' },
+    -- https://docs.bazel.build/versions/5.4.1/build-ref.html#workspace
+    root_dir = util.root_pattern('WORKSPACE', 'WORKSPACE.bazel'),
+  },
+  docs = {
+    description = [[
+https://bzl.io/
+
+https://docs.stack.build/docs/cli/installation
+
+https://docs.stack.build/docs/vscode/starlark-language-server
+]],
+    default_config = {
+      root_dir = [[root_pattern(".git")]],
+    },
+  },
+}