Move lsp config to local file structure

.config/nvim/lsp/alloy_ls.lua

@@ -0,0 +1,30 @@
+---@brief
+---
+--- https://github.com/AlloyTools/org.alloytools.alloy
+---
+--- Alloy is a formal specification language for describing structures and a tool for exploring them.
+---
+--- You may also need to configure the filetype for Alloy (*.als) files:
+---
+--- ```
+--- autocmd BufNewFile,BufRead *.als set filetype=alloy
+--- ```
+---
+--- or
+---
+--- ```lua
+--- vim.filetype.add({
+---   pattern = {
+---     ['.*/*.als'] = 'alloy',
+---   },
+--- })
+--- ```
+---
+--- Alternatively, you may use a syntax plugin like https://github.com/runoshun/vim-alloy.
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'alloy', 'lsp' },
+  filetypes = { 'alloy' },
+  root_markers = { '.git' },
+}