Move lsp config to local file structure

.config/nvim/lsp/theme_check.lua

@@ -0,0 +1,24 @@
+---@brief
+---
+--- https://github.com/Shopify/shopify-cli
+---
+--- `theme-check-language-server` is bundled with `shopify-cli` or it can also be installed via
+---
+--- https://github.com/Shopify/theme-check#installation
+---
+--- **NOTE:**
+--- If installed via Homebrew, `cmd` must be set to 'theme-check-liquid-server'
+---
+--- ```lua
+--- vim.lsp.config('theme_check, {
+---   cmd = { 'theme-check-liquid-server' }
+--- })
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'theme-check-language-server', '--stdio' },
+  filetypes = { 'liquid' },
+  root_markers = { '.theme-check.yml' },
+  settings = {},
+}