Missing some type definitions (docs)

[bartolomej]

Issue To Be Solved

While browsing documentation, I noticed there are a few instances where I can't find information about the type returned by fcl-js.

1. Transaction args

2. Block seals

Both instances are missing links to type definition docs (as in other cases).

Suggest A Solution

I think it would be helpful to add links to type definitions or even some other related documentation that could be helpfull.

Context

I'm working on defining Flow blockchain types (used by fcl-js) in our codebase (project Flowser): https://github.com/onflowser/flowser/blob/ms2-architectural-changes/backend/src/flow/services/flow-gateway.service.ts