Use type alias instead of interface

[metonym]

This resolves the TypeScript errors for the generated types, but now causes issues for consumption.

This is because certain attributes that exist on RestProps do not overlap, resulting in Error: Type <X> is not assignable to type 'never'. (ts).

The overlapping custom props would need to be omitted from RestProps, e.g., Omit<RestProps, "size">.

[metonym]

Needs something like:

type RestProps = SvelteHTMLElements["input"];

type ComponentProps = { /** ... */ };

export type SearchProps = Omit<RestProps, keyof ComponentProps> & ComponentProps;