Move lsp config to local file structure

.config/nvim/lsp/jsonnet_ls.lua

@@ -0,0 +1,20 @@
+--- @brief
+---
+--- https://github.com/grafana/jsonnet-language-server
+---
+--- A Language Server Protocol (LSP) server for Jsonnet.
+---
+--- The language server can be installed with `go`:
+--- ```sh
+--- go install github.com/grafana/jsonnet-language-server@latest
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = { 'jsonnet-language-server' },
+  filetypes = {
+    'jsonnet',
+    'libsonnet',
+  },
+  root_markers = { 'jsonnetfile.json', '.git' },
+}