Updates for miro webpage

* Updates for miro webpage

* remove no-referrer policy else miro anon boards will not work


Approved-by: Gideon Avida
Approved-by: Alan Nuchnoi
Approved-by: Can Yildiz

Integrates the compute engine with the ESQL frontend.

This PR adds physical plan nodes, as well as mappers to turn logical into physical plan nodes and optimize the physical plan to determine where data should be extracted and how parallelism is to be introduced. It further compiles down a physical plan to a set of drivers (containing operators) that can then be executed.

All this is integrated into the _esql REST endpoint, which now allows to run tests such as `from test | eval x = count + 7 | sort x | limit 1` and `from test | stats avg_count = avg(count) | eval x = avg_count + 7`.