Stabilize rapid workspace switching handoff

scripts/test-unit.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+
+PROJECT="GhosttyTabs.xcodeproj"
+SCHEME="cmux-unit"
+CONFIGURATION="${CMUX_TEST_CONFIGURATION:-Debug}"
+DESTINATION="${CMUX_TEST_DESTINATION:-platform=macOS}"
+
+# Default to `test` when no explicit xcodebuild action is provided.
+if [ "$#" -eq 0 ]; then
+  set -- test
+fi
+
+exec xcodebuild \
+  -project "$PROJECT" \
+  -scheme "$SCHEME" \
+  -configuration "$CONFIGURATION" \
+  -destination "$DESTINATION" \
+  "$@"