Context window percentage like on the CLI tools

[wscheffer]

Feature Description

I would be really useful to be able to see when you are close to getting the session to long message so that you don't ask Kiro to do something and then half way though the work is says the session is to long, unless you are internally completing the last request and then only after that saying the session is to long. If the latter is true then I would be nice to rather have a message from Kiro stating that it has completed thhe work but the session has come to its end

Use Case

When speaking to Kiro in a session

Additional Context

No response