[FEATURE] Configure root directory for slash commands

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

I want to Generate a command / workflow library for all agents and keep the in a single repository

Proposed Solution

make slash command directory that claude looks for configurable

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_