Public RPC Aggregator

Some setting in our erpc.yaml (like projects.networks.[i].public = true) which would automatically add all the public upstreams for our network, plus we could add our own custom ones on-top of that just with the normal way of specifying upstreams)

By public upstreams, this refers to https://chainlist.org/ RPC endpoints. Chainlist is open source and has an extremely wide avalibility of RPCs for each chain, so it is a great choice for this.

It would be great if the implementation of this could also come with some reasonable failsafe defaults to aggressively ignore ones that are constantly failing (many of these RPCs are bad, so we need to filter them out fast).

Relevant conversation and context: https://t.me/erpc_cloud/449 (@WesleyCharlesBlake already started down this path)

This would be absolutely HUGE for supporting multichain applications, as now developer no longer need to worry about specific RPC endpoints at all, and can add new chains to their app extremely easily.