[feature]: support prometheus query language

[stone1100]

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[joyant]

Two questions:

1. Should we create a dedicated port, 9090, for Prometheus SDK, or build upon the existing 9000 port?
2. Should query results conform to the Lindb data structure or should they fully comply with the Prometheus SDK data structure?

[stone1100]

1. I should be ok to build upon 9000, add a new api to support PromQL.
2. I think support prometheus data structure for query result set is better, because user can reuse grafana dashboard.

Read, tow options

• Support prometheus remote read
• Implement PromQL
  I think implementing PromQL is better because user needn't deploy prometheus, but more complex.

Write:
Support prometheus remote write.

[joyant]

I have also reviewed some materials, and it seems that Prometheus remote write and implementing PromQL appear to be better solutions. If you think it's okay, please assign the task to me.