nvim: Extraction completion setup into own module

As a first step to disentangle the ide.lua module into completion,
formatting, lsp (and maybe lint?), this separates the completion module
into its own file.

nvim/.config/nvim/lua/plugins/config/lsp.lua

@@ -45,6 +45,7 @@ local servers = {
 
 -- TODO installed for conform/nvim-lint so should be sourced from there not here
 local to_mason =
+	---@diagnostic disable-next-line:deprecated
 	{ "stylua", "shellcheck", "shfmt", "markdownlint", "bibtex-tidy", "jq", "prettier", "ruff", unpack(servers) }
 require("mason-tool-installer").setup({
 	-- a list of all tools you want to ensure are installed upon