Implement `HomePage`

[nivisi]

Let's setup our HomePage. It must have:

• An app bar with later text; // for the app bar, let's create and use a custom widget called LaterAppBar
• A loading state with a simple circular loader (for now);
• An empty state that has a text Pretty empty here! 👀 \n Let's create your first later record. and a button Create;
• An error state that has a text Something went wrong during loading record... and a button Try again
• Add BlocProvider. Note: please use injector for creating a bloc.
• The actual list! It must have items rendered as tiles (for now) with the title and a chevron at the right.