Support Mixin Route Api.

[LixvYang]

Should support access to mixin route web3 tokens/quote/view/swap ...

Such as https://github.com/DomeLiquid/mixin-kit-go/blob/master/_examples/web3/web3.go

demo

[LixvYang]

I'm planning to implement a rust mixin sdk, since the mixin bot go sdk implementation is functional programming, it's less difficult to port, like typescript.