refactor: move lib/policy/config to lib/config

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/config/testdata/good/git_client.json

@@ -0,0 +1,14 @@
+{
+  "bots": [
+    {
+      "name": "allow-git-clients",
+      "action": "ALLOW",
+      "expression": {
+        "all": [
+          "userAgent.startsWith(\"git/\") || userAgent.contains(\"libgit\")",
+          "\"Git-Protocol\" in headers && headers[\"Git-Protocol\"] == \"version=2\""
+        ]
+      }
+    }
+  ]
+}