feat: delete multiple plugins at once

[vladdoster]

Description

Enable the delete to delete multiple plugins at once.

Motivation and Context

Increase the usability of the delete command.

Related Issue(s)

Usage examples

zi delete OMZL::key-bindings.zsh r-darwish/topgrade zdharma-continuum/fast-syntax-highlighting

How Has This Been Tested?

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [X] My change requires a change to the documentation.
• [X] I have updated the documentation accordingly.
• [X] I have added tests to cover my changes.
• [X] All new and existing tests passed.