fix: creinstall cmd --quiet & --force flags

[vladdoster]

Description

• -q/--quiet && -f/--force options now work
• update creinstall zsh completion with --quiet, --force, and --help flags
• move creinstall cmd logic to dedicated function

Related Issue(s)

Closes #518

Motivation and Context

Usage examples

How Has This Been Tested?

Types of changes

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

Checklist:

• All new and existing tests passed.
• I have added tests to cover my changes.
• I have updated the documentation accordingly.

[alichtman]

Shouldn't --quiet silence the output shown here? I was expecting it to remove the Installed X completions line