Add support for `panther`

[squivix]

Is your device already requested?

• [X] I have searched the existing issues

Brand

Google

Name

Pixel 7

Device code

panther

Model

GVU6C

Device images

No response

Do you own the device and would be willing to test the installer?

• [X] I own the device and am willing to test the installer on it.

Additional context

No response