fix: add missing mockery config

.mockery.yaml

@@ -0,0 +1,10 @@
+with-expecter: true
+dir: "{{.InterfaceDir}}"
+filename: "mock_{{.InterfaceName | lower}}.go"
+inpackage: true
+#packages:
+#  github.com/bilalcaliskan/rss-feed-filterer/internal/feed:
+#    config:
+#    interfaces:
+#      Parser:
+#        config:

README.md

@@ -41,9 +41,10 @@
   - Uncomment **line 165** in [.github/workflows/push.yml](.github/workflows/push.yml)
   - Uncomment **line 70** to **line 80** in [build/package/.goreleaser.yaml](build/package/.goreleaser.yaml)
 
-## Used Libraries
+## Used Libraries and Tools
 - [spf13/cobra](https://github.com/spf13/cobra)
 - [rs/zerolog](https://github.com/rs/zerolog)
+- [vektra/mockery](https://github.com/vektra/mockery)
 
 ## Development
 This project requires below tools while developing: