feat(api): feature flags (#7356)

* feat(api): feature API proto definitions

* update proto based on discussion with @livio-a

* cleanup old feature flag stuff

* authz instance queries

* align defaults

* projection definitions

* define commands and event reducers

* implement system and instance setter APIs

* api getter implementation

* unit test repository package

* command unit tests

* unit test Get queries

* grpc converter unit tests

* migrate the V1 features

* migrate oidc to dynamic features

* projection unit test

* fix instance by host

* fix instance by id data type in sql

* fix linting errors

* add system projection test

* fix behavior inversion

* resolve proto file comments

* rename SystemDefaultLoginInstanceEventType to SystemLoginDefaultOrgEventType so it's consistent with the instance level event

* use write models and conditional set events

* system features integration tests

* instance features integration tests

* error on empty request

* documentation entry

* typo in feature.proto

* fix start unit tests

* solve linting error on key case switch

* remove system defaults after discussion with @eliobischof

* fix system feature projection

* resolve comments in defaults.yaml

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/api/grpc/admin/feature.go

@@ -3,13 +3,17 @@ package admin
 import (
 	"context"
 
+	"github.com/muhlemmer/gu"
+
 	object_pb "github.com/zitadel/zitadel/internal/api/grpc/object"
-	"github.com/zitadel/zitadel/internal/domain"
+	"github.com/zitadel/zitadel/internal/command"
 	admin_pb "github.com/zitadel/zitadel/pkg/grpc/admin"
 )
 
 func (s *Server) ActivateFeatureLoginDefaultOrg(ctx context.Context, _ *admin_pb.ActivateFeatureLoginDefaultOrgRequest) (*admin_pb.ActivateFeatureLoginDefaultOrgResponse, error) {
-	details, err := s.command.SetBooleanInstanceFeature(ctx, domain.FeatureLoginDefaultOrg, true)
+	details, err := s.command.SetInstanceFeatures(ctx, &command.InstanceFeatures{
+		LoginDefaultOrg: gu.Ptr(true),
+	})
 	if err != nil {
 		return nil, err
 	}