Add nebulas network support#1

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includeleec wants to merge 17 commits intonebulasio:multifrom

includeleec:multi

Commits on Feb 23, 2022

Commits on Feb 24, 2022

add bridge nas call chrome wallet.
includeleec
committed

Commits on Feb 25, 2022

update send nas value to wei.
includeleec
committed

Commits on Mar 2, 2022

update nebulas call.
includeleec
committed

Commits on Mar 3, 2022

del nebulas console log.
includeleec
committed

Commits on Mar 8, 2022