Move context from modules to services (#29440)

Since `modules/context` has to depend on `models` and many other
packages, it should be moved from `modules/context` to
`services/context` according to design principles. There is no logic
code change on this PR, only move packages.

- Move `code.gitea.io/gitea/modules/context` to
`code.gitea.io/gitea/services/context`
- Move `code.gitea.io/gitea/modules/contexttest` to
`code.gitea.io/gitea/services/contexttest` because of depending on
context
- Move `code.gitea.io/gitea/modules/upload` to
`code.gitea.io/gitea/services/context/upload` because of depending on
context

routers/api/v1/notify/notifications.go

@@ -9,9 +9,9 @@ import (
 
 	activities_model "code.gitea.io/gitea/models/activities"
 	"code.gitea.io/gitea/models/db"
-	"code.gitea.io/gitea/modules/context"
 	api "code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/routers/api/v1/utils"
+	"code.gitea.io/gitea/services/context"
 )
 
 // NewAvailable check if unread notifications exist

routers/api/v1/notify/repo.go

@@ -10,9 +10,9 @@ import (
 
 	activities_model "code.gitea.io/gitea/models/activities"
 	"code.gitea.io/gitea/models/db"
-	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 )
 

routers/api/v1/notify/threads.go

@@ -10,7 +10,7 @@ import (
 	activities_model "code.gitea.io/gitea/models/activities"
 	"code.gitea.io/gitea/models/db"
 	issues_model "code.gitea.io/gitea/models/issues"
-	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 )
 

routers/api/v1/notify/user.go

@@ -9,8 +9,8 @@ import (
 
 	activities_model "code.gitea.io/gitea/models/activities"
 	"code.gitea.io/gitea/models/db"
-	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 )