[229] Update near-api-js docs to showcase FailoverRPCProvider

[near-dx]

Title:
Update near-api-js docs to showcase FailoverRPCProvider
Description:
a 'provider' object was introduced into the near-api-js config in April, our docs here and the RPC provider page should be updated to showcase how one can configure multiple RPC providers to enable automatic failover to alternative providers after a configurable amount of rpc calls fail on the first provider.

near/near-api-js#1334

Info

Reported by: charles (charles@near.org) - Open in Gleap
Location: US
Type: 💡 FEATURE REQUEST

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Metadata

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userAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36
browser: Chrome
systemName: MacOS
sessionDuration: 183
devicePixelRatio: 2
screenWidth: 1512
screenHeight: 982
innerWidth: 1364
innerHeight: 823
currentUrl: https://docs.near.org/tools/near-api-js/quick-reference#what-is-near-api-js
language: en-US
sdkVersion: 10.1.0
sdkType: javascript
environment: prod