wip basics for bloc based state management

lib/state/infrastructure/controller.dart

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+import 'package:flutter_bloc/flutter_bloc.dart';
+
+abstract class Controller<TContentType> extends Cubit<TContentType> {
+  Controller(super.initialState);
+}

lib/state/infrastructure/loadable_state.dart

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+
+class LoadableState<TState> {
+  final LoadingState loadingState;
+  final TState? data;
+
+  const LoadableState({required this.loadingState, required this.data});
+
+  LoadableState<TState> loading() =>
+      LoadableState<TState>(loadingState: LoadingState.loading, data: null);
+
+  LoadableState<TState> cached(TState state) =>
+      LoadableState<TState>(loadingState: LoadingState.loading, data: state);
+
+  LoadableState<TState> done(TState state) =>
+      LoadableState<TState>(loadingState: LoadingState.none, data: state);
+
+  LoadableState<TState> error(TState state) =>
+      LoadableState<TState>(loadingState: LoadingState.none, data: state);
+
+  bool isBackgroundLoading() =>
+      loadingState == LoadingState.loading && data != null;
+
+  bool hasStateData() =>
+      data != null;
+}
+
+enum LoadingState {
+  loading,
+  failed,
+  none,
+}

lib/state/infrastructure/state_extensions.dart

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+import 'package:flutter/cupertino.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+
+extension StateExtensions on BuildContext {
+  TState readController<TState>() => read<TState>();
+  TState watchController<TState>() => watch<TState>();
+}