Add `RPCServerWithEnhancedSupport` to dramatically reduce number of files and changes required to add most new chains

[hboon]

Contains 2 commits:

• 1st commit contains the changes for this PR
• 2nd commit is to show how many files and changes are needed to add a basic chain (2 files, but still many lines of changes) — will be removed before merging

With this PR, when we need to add a new chain that doesn't have more fancy features and exceptions, it should only touch 2 files instead of 20 (!) files. I've also noticed that since we moved lots of code out into pods, including AlphaWalletFoundation, when we add a new case to RPCServer and build, it no longer shows all the places which needs to be changed (i.e. with errors) like it used to. We have to change and build, repeat a few times to sweep through all the files, making it even slower.

@oa-s not sure if this approach is good. Thoughts?

[Phinetwork]

Please be sure the v2 chain is chain id 144 & explorer phiscan.com the chain id and explorer is different than V1 chain. Just want to make sure this is clear.

[hboon]

Please be sure the v2 chain is chain id 144 & explorer phiscan.com the chain id and explorer is different than ...

@Phinetwork yeah. Thanks for the heads-up. The PHI 2 changes here are just temporary placeholders first.

[Phinetwork]

Please be sure the v2 chain is chain id 144 & explorer phiscan.com the chain id and explorer is different than ...

@Phinetwork yeah. Thanks for the heads-up. The PHI 2 changes here are just temporary placeholders first.

Ok great just wanted to make sure. Appreciate your help @hboon your awesome.

[hboon]

Force-pushed so second commit (which belongs to a separate PR) completes PHI 2 integration

[hboon]

Force-pushed after rebase master and removing the PHI 2 commit. Going to merge.