Add '--show-stats' to 'influxdb3 query'

[sanderson]

It would be nice to have the option to return some query execution statistics when using the influxdb3 query command. This would be set to false by default, but when enabled, it would output query statistics to stdout. For example:

> influxdb3 query --database my-db --show-stats 'select * from table'
#...<query results>

Query statistics
----------------
plan_duration: ...
permit_duration: ...
execute_duration: ...
end2end_duration: ...
compute_duration: ...
max_memory: ...

Use case:
This would help to easily see execution stats of single queries and provide an alternative to having to query stats from system tables.

Alternatives considered:
DataFusion outputs query durations in their REPL, so I believe at least some of this data is available at query time. AFAIK, this functionality isn't exposed in a usable way.

[sanderson]

I would also propose that if results are written to a file, the statistics would still only be output on the command line and not included with query results in the output file.