Docs: Transaction type is 'unrolled', making types look much more complex

[mcintyre94]

As an example signTransactionMessageWithSigners returns the type Promise<SendableTransaction & Transaction & TransactionWithLifetime>

SendableTransaction is exported: export type SendableTransaction = FullySignedTransaction & TransactionWithinSizeLimit

In our docs this shows as:

Promise<FullySignedTransaction & TransactionWithinSizeLimit & Readonly<{ messageBytes: TransactionMessageBytes; signatures: SignaturesMap; }> & TransactionWithLifetime>

This looks much more complex, because the Transaction type has been unnecessarily unrolled to the fields that it contains. Transaction is a core type and makes sense to keep as-is in our documentation.

I'm not sure if this is a Fumadocs bug or something we can configure.