feat(core): add DaffFailureAction (#2634)

libs/core/state/src/actions/failure.type.ts

@@ -0,0 +1,13 @@
+import { Action } from '@ngrx/store';
+
+import { DaffStateError } from '../errors/state-error.interface';
+
+/**
+ * An action that represents a failure of an operation.
+ */
+export interface DaffFailureAction extends Action {
+  /**
+   * A list of errors that occured during the operation.
+   */
+  readonly payload: DaffStateError[];
+}

libs/core/state/src/actions/public_api.ts

@@ -0,0 +1 @@
+export *from './failure.type';

libs/core/state/src/public_api.ts

@@ -1,8 +1,9 @@
-export * from './operators/public_api';
-export * from './states/public_api';
-export * from './errors/public_api';
-export * from './reducers/public_api';
+export * from './actions/public_api';
 export * from './collection/public_api';
+export * from './errors/public_api';
 export * from './operation/public_api';
+export * from './operators/public_api';
+export * from './reducers/public_api';
+export * from './states/public_api';
 
 export { DaffStoreFacade } from './store/facade';