[TS SDK] Update CoinClient to address #5648 and #5720

[banool]

Description

This addresses #5648 and #5720. While I'm here I fix some incorrect documentation on checkBalance, clarify the docs for generating ABIs, and add some more comments to these functions.

Based on a manual inspection and the current / new tests, this should be backwards compatible.

Test Plan

I added new tests, run them like this:

pnpm test

[banool]

Once this lands I'll update https://stackoverflow.com/questions/74519630/how-do-i-transfer-apt-to-an-account-that-doesnt-exist-on-chain-yet/74519631.

[github-actions]

✅ Forge suite compat success on testnet_2d8b1b57553d869190f61df1aaf7f31a8fc19a7b ==> 075b5bdcf402763c1b536438180ab2241faa41cc

Compatibility test results for testnet_2d8b1b57553d869190f61df1aaf7f31a8fc19a7b ==> 075b5bdcf402763c1b536438180ab2241faa41cc (PR)
1. Check liveness of validators at old version: testnet_2d8b1b57553d869190f61df1aaf7f31a8fc19a7b
compatibility::simple-validator-upgrade::liveness-check : 7257 TPS, 5515 ms latency, 10400 ms p99 latency,no expired txns
2. Upgrading first Validator to new version: 075b5bdcf402763c1b536438180ab2241faa41cc
compatibility::simple-validator-upgrade::single-validator-upgrade : 5193 TPS, 7901 ms latency, 11000 ms p99 latency,no expired txns
3. Upgrading rest of first batch to new version: 075b5bdcf402763c1b536438180ab2241faa41cc
compatibility::simple-validator-upgrade::half-validator-upgrade : 4187 TPS, 9547 ms latency, 12800 ms p99 latency,no expired txns
4. upgrading second batch to new version: 075b5bdcf402763c1b536438180ab2241faa41cc
compatibility::simple-validator-upgrade::rest-validator-upgrade : 6694 TPS, 5805 ms latency, 9800 ms p99 latency,no expired txns
5. check swarm health
Compatibility test for testnet_2d8b1b57553d869190f61df1aaf7f31a8fc19a7b ==> 075b5bdcf402763c1b536438180ab2241faa41cc passed
Test Ok

• Grafana dashboard
• Humio Logs
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite land_blocking success on 075b5bdcf402763c1b536438180ab2241faa41cc

performance benchmark with full nodes : 6852 TPS, 5776 ms latency, 9900 ms p99 latency,(!) expired 600 out of 2926720 txns
Test Ok

• Grafana dashboard
• Humio Logs
• Test runner output
• Test run is land-blocking