feat(pack): add pack for keybindings to diff command

[valentingregoire]

📑 Description

Added keybindings for the diff command. This is now accessible via the <Leader>D submenu.

ℹ Additional Information

[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).

[mehalter]

This should probably go in recipes since this isn't adding a plugin.

[valentingregoire]

This should probably go in recipes since this isn't adding a plugin.

Probably or definitely?

[Uzaaft]

Please refactor this to use astroui for the icon.

[Uzaaft]

This should probably go in recipes since this isn't adding a plugin.

Probably or definitely?

100% recipes makes more sense.

[valentingregoire]

This should probably go in recipes since this isn't adding a plugin.

Probably or definitely?

100% recipes makes more sense.

Will make the changes one of the following days 👍.

[boydaihungst]

There are 2 spaces after the icon.

[Uzaaft]

There are 2 spaces after the icon.

A PR would have been more helpful.

[valentingregoire]

Thanks, people!!