Integration test framework (#572)

Author: replydev

Cargo.lock

@@ -55,3 +55,9 @@ color-eyre = "0.6.5"
 enum_dispatch = "0.3.13"
 derive_builder = "0.20.1"
 globset = "0.4.16"
+
+[dev-dependencies]
+assert_cmd = "2.0.17"
+assert_fs = "1.1.3"
+predicates = "3.1.3"
+test-case = "3.3.1"