a15: Add Pixel 7 (panther) manifest

Description

a15: Add Pixel 7 (panther) manifest

Issues

https://gitlab.e.foundation/e/devices/backlog/-/issues/1478

10 commandments of code review

👪 ❤️ https://gitlab.e.foundation/groups/e/-/wikis/contribute/development-processes/code-review-guidelines

Summary by CodeRabbit

• New Features

  • Added support for multiple Google Pixel devices in the Tensor GS101 and GS201 families (including Panther/Pantah variants), enabling builds and installs for these models.

• Chores

  • Updated project manifests to include required device and common components.
  • Optimized kernel retrieval with a shallow clone to reduce initial sync time.