fix(java): give java a default nvim-dap config (#4261)

## Description

<!-- Describe the big picture of your changes to communicate to the
maintainers
  why we should accept this pull request. -->
Currently, there are no Java configurations for nvim-dap upon enabling
the Java extras.

This requires debugging configurations to be setup manually afterwards.

(This is unlike many other language extras which do have nvim-dap
support "out of the box")

This pr creates an initial configuration for nvim-dap which lets it
attach to a debugging process on port 5005.
(such as a spring boot application) More can be added if there are any
experienced Java devs here.

## Related Issue(s)

<!--
  If this PR fixes any issues, please link to the issue here.
  - Fixes #<issue_number>
-->
None

## Screenshots

<!-- Add screenshots of the changes if applicable. -->
Error message:

![image](https://github.com/user-attachments/assets/5922cf48-6ac7-4a2a-8785-1f9b958089e4)

Java remote debugging open:

![image](https://github.com/user-attachments/assets/dfbe7c5b-2308-4aa4-a236-487605e4c75a)


## Checklist

- [x] I've read the
[CONTRIBUTING](https://github.com/LazyVim/LazyVim/blob/main/CONTRIBUTING.md)
guidelines.

lua/lazyvim/plugins/extras/lang/java.lua

@@ -40,6 +40,20 @@ return {
   {
     "mfussenegger/nvim-dap",
     optional = true,
+    opts = function()
+      -- Simple configuration to attach to remote java debug process
+      -- Taken directly from https://github.com/mfussenegger/nvim-dap/wiki/Java
+      local dap = require("dap")
+      dap.configurations.java = {
+        {
+          type = "java",
+          request = "attach",
+          name = "Debug (Attach) - Remote",
+          hostName = "127.0.0.1",
+          port = 5005,
+        },
+      }
+    end,
     dependencies = {
       {
         "williamboman/mason.nvim",