A small helper class for discord.py that builds a discord.ui.LayoutView straight from a raw
Components V2 payload (the plain dict/JSON shape Discord itself sends and expects), and converts
it back.
Normally you build a LayoutView by instantiating the discord.ui items yourself
(discord.ui.Container(...), discord.ui.Section(...), etc) and adding them to the view with
add_item. That's fine when you're writing the layout by hand, but it gets annoying if you want
to store layouts somewhere (a database, a JSON file, a layout editor) and load them dynamically.