### Description
I am the author of this
[PR](https://github.com/LazyVim/LazyVim/pull/2890).
While reviewing my own code and checking the LazyVim official website, I
noticed some inconsistencies 😓 , so I created a small PR to address
them:
### Changes
1.Each optional plugin has a comment message indicating that the plugin
is optional, but DAP does not (as shown in the image). Since the
official website already has an "optional" in title.
**I removed the comment messages regarding "optional" to avoid
confusion**.
<img width="300" alt="Screenshot 2024-05-23 at 10 31 38 PM"
src="https://github.com/LazyVim/LazyVim/assets/82575487/441979fc-20dd-4599-a91d-f27bc0841d79">
---
2. I changed the DAP to use local variables for DAP to maintain
consistency, even though both require statements reference the same
module.
* Add kotlin lang
* Update the opts.ensure_installed
* Add the kotlin setup in nvim-dap
* Update plugins based on the review comments.
1. Remove kotlin language server from mason
2. Add optinal is true, only enabled if the user has explicitly enabled
the extra plugin.
3. Remove duplicate dependencies cause they are already defined in the
plugin.
4. Add none-ls as optional
* Update comment message
