fix(lsp): simplify sqls.nvim setup for Neovim >=0.11

[theseriff]

📑 Description

The sqls.nvim plugin has been updated and now requires Neovim >=0.11. The previous manual on_attach via an LspAttach autocmd is no longer needed and causes issues (e.g., errors or LSP not attaching correctly).

Changes made:

• Removed the custom autocmds block that manually called sqls.on_attach
• Removed the dependency declaration with astrocore for that autocmd
• Simplified the plugin entry to just { "nanotee/sqls.nvim" }

📖 Additional Information

• Breaking changes: None – the SQL LSP functionality remains the same.
• New requirement: Neovim 0.11 or higher is now needed (required by the plugin itself).
• Verification: After this change, sqls should attach automatically when opening SQL files, without any extra callbacks.

[github-actions]

Review Checklist

Does this PR follow the [Contribution Guidelines](development guidelines)? Following is a partial checklist:

Proper conventional commit scoping:

• If you are adding a new plugin, the scope would be the name of the category it is being added into. ex. feat(utility): added noice.nvim plugin

• If you are modifying a pre-existing plugin or pack, the scope would be the name of the plugin folder. ex. fix(noice-nvim): fix LSP handler error

• Pull request title has the appropriate conventional commit type and scope where the scope is the name of the pre-existing directory in the project as described above

• README is properly formatted and uses fenced in links with <url> unless they are inside a [title](url)

• Entry returns a single plugin spec with the new plugin as the only top level spec (not applicable for recipes or packs).

• Proper usage of opts table rather than setting things up with the config function.

• Proper usage of specs table for all specs that are not dependencies of a given plugin (not applicable for recipes or packs).