[FEATURE] Subagent color customization

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 am creating sub agents for multple repos and I want to be able to differentiate visually when I run those subagents, having the ability to define my custom colors for subagents similar to the status line will be helpful.

Proposed Solution

Add the option such that. a user is able to customize the subagents color when invoking it, I will create a visible different and will be helpful for the users when using claude code.

Alternative Solutions

_No response_

Priority

Critical - Blocking my work

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_