Add manual wallet chain switch

[ianrowan]

Link to Issue

Closes: #6530

Description of Changes

• adds switchNetwork() method to metamask and coin base web wallets.
• method can be called to check if on network, automatically switch if not, and add if not in metamask(see below)

Other Considerations

• I noticed that in out normal enable() flow if a network is not in the users wallet, we add it with our own node/rpc. This is sub-optimal b/c the user will essentially carry our rpc around forever and make their transactions through it vs using a public node like wallets usually do
  • I added code to the new method to use public chainlist rpcs for this and we should consider the same for enable() but wanted more input here: CC @jnaviask

[ianrowan]

@masvelio You can use the new wallet method here to switch chains in metamask before first community stake transactions, etc

[masvelio]

@ianrowan I am not 100% where should I use it and if this is necessary to do before the launch of community stake?

[mhagel]

I noticed that in out normal enable() flow if a network is not in the users wallet, we add it with our own node/rpc. This is sub-optimal b/c the user will essentially carry our rpc around forever and make their transactions through it vs using a public node like wallets usually do

Good call-out.

[mhagel]

LGTM