Support for promql queries

[jiwliu]

Describe This Problem

It is hoped that ceresdb can support promql query, allowing users to select and aggregate time series data in real time

Proposal

support for promql queries

Additional Context

No response

[jiacai2050]

We already support PromQL via its remote storage API.

• https://docs.ceresdb.io/ecosystem/prometheus.html

[jiwliu]

We already support PromQL via its remote storage API.

• https://docs.ceresdb.io/ecosystem/prometheus.html

It is best that ceresdb can support pql natively and can be used through sdk.