Batocera and the ES-family handhelds run on ARM, where a linux_x64
binary will not start. The image gains the aarch64 cross compiler and
the arm64 dev libraries the pipeline links against.
The image itself also moved out of the internal package namespace,
which did not travel with the repo during the org reorganization.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
builder.Dockerfile bakes the build step's dependencies into
git.teletype.hu/internal/* so the pipeline no longer installs
packages on every run.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>