refactor(v2): init events (#7823)

creates events structures for initial projections and read models

internal/v2/user/machine_changed.go

@@ -0,0 +1,40 @@
+package user
+
+import (
+	"github.com/zitadel/zitadel/internal/domain"
+	"github.com/zitadel/zitadel/internal/v2/eventstore"
+	"github.com/zitadel/zitadel/internal/zerrors"
+)
+
+type machineChangedPayload struct {
+	Name            *string               `json:"name,omitempty"`
+	Description     *string               `json:"description,omitempty"`
+	AccessTokenType *domain.OIDCTokenType `json:"accessTokenType,omitempty"`
+}
+
+type MachineChangedEvent eventstore.Event[machineChangedPayload]
+
+const MachineChangedType = machinePrefix + ".changed"
+
+var _ eventstore.TypeChecker = (*MachineChangedEvent)(nil)
+
+// ActionType implements eventstore.Typer.
+func (c *MachineChangedEvent) ActionType() string {
+	return MachineChangedType
+}
+
+func MachineChangedEventFromStorage(event *eventstore.StorageEvent) (e *MachineChangedEvent, _ error) {
+	if event.Type != e.ActionType() {
+		return nil, zerrors.ThrowInvalidArgument(nil, "USER-JHwNs", "Errors.Invalid.Event.Type")
+	}
+
+	payload, err := eventstore.UnmarshalPayload[machineChangedPayload](event.Payload)
+	if err != nil {
+		return nil, err
+	}
+
+	return &MachineChangedEvent{
+		StorageEvent: event,
+		Payload:      payload,
+	}, nil
+}