Move git graph from models to modules/graph (#9027)

Author: lunny

models/graph.go renamed to modules/gitgraph/graph.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-package models
+package gitgraph
 
 import (
 	"fmt"

models/graph_test.go renamed to modules/gitgraph/graph_test.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
-package models
+package gitgraph
 
 import (
 	"fmt"

routers/repo/commit.go

@@ -14,6 +14,7 @@ import (
 	"code.gitea.io/gitea/modules/charset"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/gitgraph"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/gitdiff"
@@ -99,7 +100,7 @@ func Graph(ctx *context.Context) {
 
 	page := ctx.QueryInt("page")
 
-	graph, err := models.GetCommitGraph(ctx.Repo.GitRepo, page)
+	graph, err := gitgraph.GetCommitGraph(ctx.Repo.GitRepo, page)
 	if err != nil {
 		ctx.ServerError("GetCommitGraph", err)
 		return