check individual features in CI

.github/workflows/check_features.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -e
+
+echo "Checking all feature at once"
+cargo check -q --all-targets --all-features "$@"
+
+features=$(cargo metadata  --no-deps --format-version  1 | jq -r '.packages[] | select(.name = "scryer-prolog") | .features | keys | join(" ")')
+
+for feature in ${features} ; do
+	echo "Checking feature ${feature} in isolation"
+	cargo check -q --all-targets --no-default-features --features=${feature} "$@"
+done