fix(halo): use ROCm-enabled btop so the GPU panel shows the iGPU

The base module installs btop without ROCm support, so btop can't read
the Strix Halo iGPU (no rocm_smi at runtime). Add the rocmSupport build
with hiPrio to win the bin/btop collision against the base package.

systems/x86_64-linux/halo/default.nix

@@ -115,6 +115,9 @@ with lib.metacfg;
     attic-client
     azure-cli
     claude-code
+    # ROCm-enabled btop so its GPU panel shows the Strix Halo iGPU; hiPrio wins
+    # the bin/btop collision against the plain btop from the base module.
+    (lib.hiPrio (btop.override { rocmSupport = true; }))
     nvtopPackages.amd
     obsidian
     piper-tts