Merge branch 'example-cache-policies' into 'main'

Example policies for setting and getting JSON value from cache

See merge request !2

example/cacheGet_1.0.rego

+package example.cacheGet
+
+result := cache.get("mykey", "mynamespace", "myscope")

example/cacheSet_1.0.rego

+package example.cacheSet
+
+default success = false
+
+success = true {
+    msg := cache.set("mykey", "mynamespace", "myscope", input)
+    msg == "success"
+}