feat: add u8 field type support

[c12i]

This PR will close #405.

Additionally, the representation of Vec<u8> field types in UI code is a Uint8Array instead of Array<number>.

[matthme]

I'm noticing, at least in the Vue framework so far, that a u8 field does not offer the option to scaffold a UI widget, while u32 does. I think u8 could use that same widget?

[matthme]

Left one comment regarding adding the slider component as well for u8. Not sure anyone will ever use a u8 type outside of a vector though but if it's not too much effort it would be nice I think to have the same behavior as u32 in this regard.

[c12i]

I'm noticing, at least in the Vue framework so far, that a u8 field does not offer the option to scaffold a UI widget, while u32 does. I think u8 could use that same widget?

Yes, the components were not added, fixed now

[matthme]

Now it offers to use a Slider also when a Vec<u8> is scaffoldded. I'm not sure that's expected behavior. And also, when I scaffold an entry type with a u8 field and Vec<u8> field, the type of the Vec<u8> field in the Create and Edit Svelte UI components is scaffolded as Array<number> instead of Uint8Array although the type in the types.ts file is correctly a Uint8Array.

[matthme]

Looks good to me now 👍