Add table for weather observation (Stacked PR)

[CloCkWeRX]

https://github.com/Growstuff/growstuff/pull/3453 first

A small part of: https://github.com/Growstuff/growstuff/issues/1165 https://github.com/Growstuff/growstuff/issues/863

Also kind of like: https://github.com/Growstuff/growstuff/pull/1307/files

Based on https://github.com/schemaorg/schemaorg/issues/362

The idea would be to only record specific observations, with a source that have happened.

Ideally this would be from either:

• Snapshots of various weather APIs with unit conversions as required
• Directly out of home weather stations

Use cases:

As gardener with various observation tools I would like to record a snapshot of weather (manually) So that I have a history of what was happening in my own microclimate And I can compare to crop yields.

As gardener with home automation I would like to record a snapshot of weather So that I have a history of what was happening in my own microclimate And I can compare to crop yields.