feat(login): use default org for login without provided org context (#6625)

* start feature flags

* base feature events on domain const

* setup default features

* allow setting feature in system api

* allow setting feature in admin api

* set settings in login based on feature

* fix rebasing

* unit tests

* i18n

* update policy after domain discovery

* some changes from review

* check feature and value type

* check feature and value type

internal/command/instance_feature.go

@@ -0,0 +1,63 @@
+package command
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/command/preparation"
+	"github.com/zitadel/zitadel/internal/domain"
+	"github.com/zitadel/zitadel/internal/errors"
+	"github.com/zitadel/zitadel/internal/eventstore"
+	"github.com/zitadel/zitadel/internal/id"
+	"github.com/zitadel/zitadel/internal/repository/feature"
+)
+
+func (c *Commands) SetBooleanInstanceFeature(ctx context.Context, f domain.Feature, value bool) (*domain.ObjectDetails, error) {
+	instanceID := authz.GetInstance(ctx).InstanceID()
+	writeModel, err := NewInstanceFeatureWriteModel[feature.Boolean](instanceID, f)
+	if err != nil {
+		return nil, err
+	}
+	cmds, err := preparation.PrepareCommands(ctx, c.eventstore.Filter,
+		prepareSetFeature(writeModel, feature.Boolean{Boolean: value}, c.idGenerator))
+	if err != nil {
+		return nil, err
+	}
+	if len(cmds) == 0 {
+		return writeModelToObjectDetails(&writeModel.FeatureWriteModel.WriteModel), nil
+	}
+	pushedEvents, err := c.eventstore.Push(ctx, cmds...)
+	if err != nil {
+		return nil, err
+	}
+	return pushedEventsToObjectDetails(pushedEvents), nil
+}
+
+func prepareSetFeature[T feature.SetEventType](writeModel *InstanceFeatureWriteModel[T], value T, idGenerator id.Generator) preparation.Validation {
+	return func() (preparation.CreateCommands, error) {
+		if !writeModel.feature.IsAFeature() || writeModel.feature == domain.FeatureUnspecified {
+			return nil, errors.ThrowPreconditionFailed(nil, "FEAT-JK3td", "Errors.Feature.NotExisting")
+		}
+		return func(ctx context.Context, filter preparation.FilterToQueryReducer) ([]eventstore.Command, error) {
+			events, err := filter(ctx, writeModel.Query())
+			if err != nil {
+				return nil, err
+			}
+			writeModel.AppendEvents(events...)
+			if err = writeModel.Reduce(); err != nil {
+				return nil, err
+			}
+			if len(events) == 0 {
+				writeModel.AggregateID, err = idGenerator.Next()
+				if err != nil {
+					return nil, err
+				}
+			}
+			setEvent, err := writeModel.Set(ctx, value)
+			if err != nil || setEvent == nil {
+				return nil, err
+			}
+			return []eventstore.Command{setEvent}, nil
+		}, nil
+	}
+}