[FEATURE] Set color/name from the startup cli

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 need to be in a session to rename of change color, I'd like to be able to do it from the start

Proposed Solution

I'd like to be able to run claude --name= --color=

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_