use tar transformation to get the archive zig package manager approved

.gitea/workflows/build.yaml

@@ -32,7 +32,10 @@ jobs:
       - run: zig build -Dtarget=riscv64-linux
       - run: zig build -Dtarget=x86_64-macos
       - run: zig build -Dtarget=aarch64-macos
-      - run: tar -czf ${{ runner.temp }}/${{ github.sha }}-with-models.tar.gz --exclude 'zig-*' *
+      # Zig package manager expects everything to be inside a directory in the archive,
+      # which it then strips out on download. So we need to shove everything inside a directory
+      # the way GitHub/Gitea does for repo archives
+      - run: tar -czf ${{ runner.temp }}/${{ github.sha }}-with-models.tar.gz --exclude 'zig-*' --transform 's,^,${{ github.sha }}/,' *
       # - name: Sign
       #   id: sign
       #   uses: https://git.lerch.org/lobo/action-hsm-sign@v1