MM-32421: Extend channel sidebar category APIs for Plugins (#17821)

* extend plugin api with sidebar functionalities

* include generated mocks for tests

* bump up version requirements for plugin api

* update tag to 'ChannelSidebar'

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

app/plugin_api.go

@@ -439,6 +439,18 @@ func (api *PluginAPI) SearchChannels(teamID string, term string) ([]*model.Chann
 	return *channels, err
 }
 
+func (api *PluginAPI) CreateChannelSidebarCategory(userID, teamID string, newCategory *model.SidebarCategoryWithChannels) (*model.SidebarCategoryWithChannels, *model.AppError) {
+	return api.app.CreateSidebarCategory(userID, teamID, newCategory)
+}
+
+func (api *PluginAPI) GetChannelSidebarCategories(userID, teamID string) (*model.OrderedSidebarCategories, *model.AppError) {
+	return api.app.GetSidebarCategories(userID, teamID)
+}
+
+func (api *PluginAPI) UpdateChannelSidebarCategories(userID, teamID string, categories []*model.SidebarCategoryWithChannels) ([]*model.SidebarCategoryWithChannels, *model.AppError) {
+	return api.app.UpdateSidebarCategories(userID, teamID, categories)
+}
+
 func (api *PluginAPI) SearchUsers(search *model.UserSearch) ([]*model.User, *model.AppError) {
 	pluginSearchUsersOptions := &model.UserSearchOptions{
 		IsAdmin:       true,