[Task] Implement transaction status fetching

[peer2f00l]

Background

Currently, the library does not support the ability to fetch a transaction status given a transaction hash.

User Story

My company has been maintaining a transaction relayer built primarily on near-jsonrpc-client. We would like to refactor the codebase to use near-api-rs instead, but the library lacks the functionality to fetch transaction statuses. This blocks us from cleanly refactoring the codebase.

Acceptance Criteria

Given a transaction hash, or a transaction hash and sender ID, retrieve the status of the transaction from the RPC node.

Resources & Additional Notes

Noted as an inline TODO comment:

near-api-rs/api/src/transactions.rs

Lines 202 to 204 in c18d30b

	// TODO: fetch transaction status
	// TODO: fetch transaction receipt
	// TODO: fetch transaction proof