Add actions/cache/check action

src/options.ts

@@ -0,0 +1,11 @@
+/**
+ * Options to control cache restore
+ */
+export interface RestoreOptions {
+    /**
+     * Weather to skip downloading the cache entry.
+     * If lookupOnly is set to true, the restore function will only check if
+     * a matching cache entry exists.
+     */
+    lookupOnly?: boolean;
+}