Write options types manually

Context

expand(), frame(), and the rest of functions specified by JSON-LD API take options argument, described by JsonLdOptions interface in the specification.

Some options are only valid for select functions, for instance, frameExpansion is only valid for frame().

Decision

• In Python types, use a separate type for each function's options argument
• Write these types manually instead of generating them from IDL.

Consequences

• Improved typing hints in application code;
• Invalid states made unrepresentable;
• Enhanced development experience.