feat(cord-nvim)!: update to v2

[vyfor]

📑 Description

cord.nvim has been completely rewritten from the ground up, with a plethora of new features and updates. These changes may not be fully compatible with the previous version of the plugin. After extensive testing, the new version has proven stable, and we plan to merge the v2 branch on February 1, 2025.

With v2, the plugin now follows semantic versioning. Additionally, the Rust compiler is no longer required to install the plugin, as the server component can now be easily downloaded via GitHub Releases using the async :Cord update command.

ℹ Additional Information

• The minimum required Neovim version is bumped from 0.5.0 to 0.6.0. This is unlikely to affect AstroNvim users, as it already requires a much more recent version.
• A migration guide is available, but we also encourage exploring the new configuration guide to make the most of Cord v2.
• We've introduced support for icon themes, with onyx as the new default:
  

[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).