Add support for Parquet files similar to CSV/Arrow

[jexp]

Sorry, had forgotten to create the issue for this.

Parquet files also provide already schema information, which should help with smoothing the import.

And we should add support for pushdown predicates and column selection to minimize the amount of data that is loaded from the parquet infrastructure.

[michael-simons]

Here's some inspiration michael-simons/neo4j-load-parquet@0d87e79

Feel free to copy what you need. I used the least invasive library I could find for reading Parquet in Java. If you use the default Avro, you get Hadoop, Spark, a banana, the monkey holding the banana and a bit of the jungle where it lives…

Ping me if you have questions, @conker84 this has been done for a PoC how fast we can get data into the database.

[conker84]

@michael-simons thank you so much!