[Feature Request] Add a new indexer endpoint to get all txs related to an address

[0xaptosj]

🚀 Feature Request Description

Existing getAccountTransactions API only returns txs that sender equals to the address. It doesn't return txs involved address (e.g. a tx sent by someone else but transfer token to the address).

Here's an example address on explorer. When I call getAccountTransactions on same address, it only returns me 5 txs.

Explorer calls indexer to get all txs related to the address, we should have add a similar API in sdk.

This discrepancy between explorer and getAccountTransactions of ts sdk is reported by an user on dev discussion.

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