feat(repo): support local repositories (#4890)

* feat(repo): support local repositories

* fix tests

* test: fix client/server tests

* docs: update

* test: add fs tests

* test: do not update golden files if overridden

* docs: remove a comment about fs deprecation

integration/testdata/fixtures/repo/rule-exception/policy/exception.rego

@@ -0,0 +1,15 @@
+package builtin.dockerfile.DS002
+
+exception[rules] {
+	instruction := input.stages[_][_]
+	instruction.Cmd == "label"
+
+	key := instruction.Value[i]
+	i % 2 == 0
+	key == "user.root"
+
+	value := instruction.Value[plus(i, 1)]
+	value == "\"allow\""
+
+	rules = [""]
+}