refactored code, removed *_helper.go files and placed them in *.resolvers.go files for uniformity

backend/graph/gitea_helpers.go

@@ -1,17 +0,0 @@
-package graph
-
-import (
-	"adam-french.co.uk/backend/graph/model"
-	"adam-french.co.uk/backend/services"
-)
-
-func mapGiteaFeed(feed *services.GiteaFeedResponse) *model.GiteaFeedItem {
-	return &model.GiteaFeedItem{
-		AvatarURL:     feed.ActUser.AvatarURL,
-		RepoURL:       feed.Repo.HTMLURL,
-		RepoName:      feed.Repo.FullName,
-		OpType:        feed.OpType,
-		CommitMessage: services.ParseCommitMessage(feed.Content),
-		CreatedAt:     feed.Created,
-	}
-}