Add Mongo Connection as option

[ericschmar]

Is your feature request related to a problem? Please describe. We have data sources spanning csv, parquet, etc. but also have a data source using MongoDB. Currently, I have to export our enormous collection and run my own script to convert it into a parquet file before importing it.

Describe the solution you'd like Ideally, I could add a connection within Rill and query data real time that way.

Describe alternatives you've considered Microsoft Power BI but the licensing cost is too high.

Additional context N/A