T2551
Depends on D13015
Creates `getLatestBlockHeight` as a standalone helper function now that it will be needed by both airdrop and alias components.
No unit test functions added since this is an API wrapper function.
[Cashtab] [Alias] pt 1 - Create scaffold for new Identity component
[Cashtab] [Alias] pt 2 - Upgrade sendXec() to handle alias registration
[Cashtab] [Alias] pt 3 - Implement isAliasAvailable function
[Cashtab] [Alias] pt 4 - Implement isAddressRegistered function
[Cashtab] [Alias] pt 5 - Implement getAddressFromAlias function
**[Cashtab] [Alias] pt 6.1 - Create getLatestBlockHeight as a helper function**
[Cashtab] [Alias] pt 6.2 - Implement getAliasesFromLocalForage
[Cashtab] [Alias] pt 6.3 - Implement updateAliases
[Cashtab] [Alias] pt 6.4 - Implement setAlisesToLocalForage
[Cashtab] [Alias] pt 6.5 - Deprecate caching related mocks and @TODOs
[Cashtab] [Alias] pt 7 - Enable alias lookup for Send XEC component
[Cashtab] [Alias] pt 8 - Enable alias lookup for Send Token component
[Cashtab] [Alias] pt 9 - Implement pricing mechanism
[Cashtab] [Alias] pt 10 - Server cron job
[Cashtab] [Alias] pt 11 - Upgrade tx history to recognize alias registration txs