Move lsp config to local file structure

.config/nvim/lsp/metals.lua

@@ -0,0 +1,32 @@
+---@brief
+---
+--- https://scalameta.org/metals/
+---
+--- Scala language server with rich IDE features.
+---
+--- See full instructions in the Metals documentation:
+---
+--- https://scalameta.org/metals/docs/editors/vim#using-an-alternative-lsp-client
+---
+--- Note: that if you're using [nvim-metals](https://github.com/scalameta/nvim-metals), that plugin fully handles the setup and installation of Metals, and you shouldn't set up Metals both with it and `lspconfig`.
+---
+--- To install Metals, make sure to have [coursier](https://get-coursier.io/docs/cli-installation) installed, and once you do you can install the latest Metals with `cs install metals`.
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'metals' },
+  filetypes = { 'scala' },
+  root_markers = { 'build.sbt', 'build.sc', 'build.gradle', 'pom.xml' },
+  init_options = {
+    statusBarProvider = 'show-message',
+    isHttpEnabled = true,
+    compilerOptions = {
+      snippetAutoIndent = false,
+    },
+  },
+  capabilities = {
+    workspace = {
+      configuration = false,
+    },
+  },
+}