Add badges (#3)

README.md

@@ -1,5 +1,16 @@
 # AnyPackage.Pkgx
 
+[![gallery-image]][gallery-site]
+[![build-image]][build-site]
+[![cf-image]][cf-site]
+
+[gallery-image]: https://img.shields.io/powershellgallery/dt/AnyPackage.Pkgx
+[build-image]: https://img.shields.io/github/actions/workflow/status/anypackage/pkgx/ci.yml
+[cf-image]: https://img.shields.io/codefactor/grade/github/anypackage/pkgx
+[gallery-site]: https://www.powershellgallery.com/packages/AnyPackage.Pkgx
+[build-site]: https://github.com/anypackage/pkgx/actions/workflows/ci.yml
+[cf-site]: https://www.codefactor.io/repository/github/anypackage/pkgx
+
 `AnyPackage.Pkgx` is an AnyPackage provider that facilitates installing `pkgx` packages.
 
 ## Requirements