[FEATURE] Add a progress bar for `claude update` and `claude upgrade` 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

When I run update command it only shows the version it's updating to but I have no idea when will it finish, a progress bar would help a lot.

Proposed Solution

Add an additional line below:
Downloading... 67%
There can be more status:
Pending...
Installing... 100%
Applying... 34%

Alternative Solutions

_No response_

Priority

Medium - Would be very helpful

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_