Move lsp config to local file structure

.config/nvim/lsp/groovyls.lua

@@ -0,0 +1,30 @@
+---@brief
+---
+--- https://github.com/prominic/groovy-language-server.git
+---
+--- Requirements:
+---  - Linux/macOS (for now)
+---  - Java 11+
+---
+--- `groovyls` can be installed by following the instructions [here](https://github.com/prominic/groovy-language-server.git#build).
+---
+--- If you have installed groovy language server, you can set the `cmd` custom path as follow:
+---
+--- ```lua
+--- vim.lsp.config('groovyls', {
+---     -- Unix
+---     cmd = { "java", "-jar", "path/to/groovyls/groovy-language-server-all.jar" },
+---     ...
+--- })
+--- ```
+
+---@type vim.lsp.Config
+return {
+  cmd = {
+    'java',
+    '-jar',
+    'groovy-language-server-all.jar',
+  },
+  filetypes = { 'groovy' },
+  root_markers = { 'Jenkinsfile', '.git' },
+}