Containing Group/Sub-Group relationships (#5105)

* Add UI support for setting containing groups
* Show containing groups in group details panel
* Move tag hierarchical filter code into separate type
* Add depth to scene_count and add sub_group_count
* Add sub-groups tab to groups page
* Add containing groups to edit groups dialog
* Show containing group description in sub-group view
* Show group scene number in group scenes view
* Add ability to drag move grid cards
* Add sub group order option
* Add reorder sub-groups interface
* Separate page size selector component
* Add interfaces to add and remove sub-groups to a group
* Separate MultiSet components
* Allow setting description while setting containing groups

pkg/group/service.go

@@ -0,0 +1,46 @@
+package group
+
+import (
+	"context"
+
+	"github.com/stashapp/stash/pkg/models"
+)
+
+type CreatorUpdater interface {
+	models.GroupGetter
+	models.GroupCreator
+	models.GroupUpdater
+
+	models.ContainingGroupLoader
+	models.SubGroupLoader
+
+	AnscestorFinder
+	SubGroupIDFinder
+	SubGroupAdder
+	SubGroupRemover
+	SubGroupReorderer
+}
+
+type AnscestorFinder interface {
+	FindInAncestors(ctx context.Context, ascestorIDs []int, ids []int) ([]int, error)
+}
+
+type SubGroupIDFinder interface {
+	FindSubGroupIDs(ctx context.Context, containingID int, ids []int) ([]int, error)
+}
+
+type SubGroupAdder interface {
+	AddSubGroups(ctx context.Context, groupID int, subGroups []models.GroupIDDescription, insertIndex *int) error
+}
+
+type SubGroupRemover interface {
+	RemoveSubGroups(ctx context.Context, groupID int, subGroupIDs []int) error
+}
+
+type SubGroupReorderer interface {
+	ReorderSubGroups(ctx context.Context, groupID int, subGroupIDs []int, insertID int, insertAfter bool) error
+}
+
+type Service struct {
+	Repository CreatorUpdater
+}