Add #[inspect(..)] attributes

[toyboot4e]

Derive macros can accept type/field attributes in the syntax #[attr(name = value)].
Let's add desired attributes to the Inspect macro!

Override

Manual

• #[inspect(with = "<function>")] (overriding inspection)
• #[inspect(default = ..)] (overriding enum variant default value on enum tag switch)

Shortcut

• #[inspect(as = "<type>")] (Into / From conversion)
• Via serde? (T → String → T, etc.)

Widget

• #[inspect(open = <bool>)]: (default open state of node)
• #[inspect_slider(min = "-50.0", max = "50.0")]

Options

Enum

• #[inspect(no_tag)] to disable tag selector (just show current tag)
• #[inspect(skip)] over variants

Options

• #[inspect(read_only)]
• #[inspect(skip)]