feat(bitbake): add language-server-bitbake support

Add default config for `language-server-bitbake`, the Yocto Project's
official language server for bit bake.

lua/lspconfig/server_configurations/bitbake_ls.lua

@@ -0,0 +1,27 @@
+local util = require 'lspconfig.util'
+
+return {
+ default_config = {
+ cmd = { 'language-server-bitbake', '--stdio' },
+ filetypes = { 'bitbake' },
+ root_dir = util.find_git_ancestor,
+ single_file_support = false,
+ },
+ docs = {
+ description = [[
+https://github.com/yoctoproject/vscode-bitbake/tree/staging/server
+https://www.npmjs.com/package/language-server-bitbake
+
+Official Bitbake Language Server for the Yocto Project.
+
+Can be installed from npm or github.
+
+```
+npm install -g language-server-bitbake
+```
+ ]],
+ default_config = {
+ root_dir = [[util.find_git_ancestor]],
+ },
+ },
+}