fix(test): Silence package import checks in GPU detection

Redirect stdout and stderr to /dev/null when checking for GPU-related package imports (jax, torch, warp) to prevent error messages from appearing in test output when these packages are not available. This maintains cleaner test output while preserving the functionality of detecting GPU capabilities.

Author: liblaf

template/.config/copier/mise-tasks/test.sh

@@ -21,7 +21,7 @@ function is-in-ci() {
 
 function needs-gpu() {
   for pkg in jax torch warp; do
-    if python -c "import $pkg"; then
+    if python -c "import $pkg" &> /dev/null; then
       return 0
     fi
   done