feat: user api requests to resource API (#9794)

# Which Problems Are Solved

This pull request addresses a significant gap in the user service v2
API, which currently lacks methods for managing machine users.

# How the Problems Are Solved

This PR adds new API endpoints to the user service v2 to manage machine
users including their secret, keys and personal access tokens.
Additionally, there's now a CreateUser and UpdateUser endpoints which
allow to create either a human or machine user and update them. The
existing `CreateHumanUser` endpoint has been deprecated along the
corresponding management service endpoints. For details check the
additional context section.

# Additional Context

- Closes https://github.com/zitadel/zitadel/issues/9349

## More details
- API changes: https://github.com/zitadel/zitadel/pull/9680
- Implementation: https://github.com/zitadel/zitadel/pull/9763
- Tests: https://github.com/zitadel/zitadel/pull/9771

## Follow-ups

- Metadata: support managing user metadata using resource API
https://github.com/zitadel/zitadel/pull/10005
- Machine token type: support managing the machine token type (migrate
to new enum with zero value unspecified?)

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Livio Spring <livio.a@gmail.com>

internal/command/user.go

@@ -353,21 +353,27 @@ func (c *Commands) userWriteModelByID(ctx context.Context, userID, resourceOwner
 	return writeModel, nil
 }
 
-func ExistsUser(ctx context.Context, filter preparation.FilterToQueryReducer, id, resourceOwner string) (exists bool, err error) {
+func ExistsUser(ctx context.Context, filter preparation.FilterToQueryReducer, id, resourceOwner string, machineOnly bool) (exists bool, err error) {
+	eventTypes := []eventstore.EventType{
+		user.MachineAddedEventType,
+		user.UserRemovedType,
+	}
+	if !machineOnly {
+		eventTypes = append(eventTypes,
+			user.HumanRegisteredType,
+			user.UserV1RegisteredType,
+			user.HumanAddedType,
+			user.UserV1AddedType,
+		)
+	}
 	events, err := filter(ctx, eventstore.NewSearchQueryBuilder(eventstore.ColumnsEvent).
 		ResourceOwner(resourceOwner).
 		OrderAsc().
 		AddQuery().
 		AggregateTypes(user.AggregateType).
 		AggregateIDs(id).
-		EventTypes(
-			user.HumanRegisteredType,
-			user.UserV1RegisteredType,
-			user.HumanAddedType,
-			user.UserV1AddedType,
-			user.MachineAddedEventType,
-			user.UserRemovedType,
-		).Builder())
+		EventTypes(eventTypes...).
+		Builder())
 	if err != nil {
 		return false, err
 	}