Move lsp config to local file structure

.config/nvim/lsp/bitbake_language_server.lua

@@ -0,0 +1,17 @@
+---@brief
+---
+--- https://github.com/Freed-Wu/bitbake-language-server
+---
+--- `bitbake-language-server` can be installed via `pip`:
+--- ```sh
+--- pip install bitbake-language-server
+--- ```
+---
+--- Language server for bitbake.
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'bitbake-language-server' },
+  filetypes = { 'bitbake' },
+  root_markers = { '.git' },
+}