Add staking feature for new networks

[RyanDinh8]

Is your feature request related to a problem? Please describe.
Zeitgeist and Litentry has now enabled staking for $ZTG and $LIT. Please add support in-app staking for them:

• $ZTG https://zeitgeist.pm/index.html
• $LIT: https://litentry.com/
• $CRU: https://wiki.crust.network/en