Add data field to record Ketones

[medavox]

Hello!
Thank you for the fantastic app, it has allowed me to drop support for my own one-man diabetes app (the only user was me).

I have a request that you add Ketones as an optional data point that you can log.

In the UK I measure them in mmol/L.

0.0 is ideal,
0.0 - 0.3 is ok
0.4 - 1.0 is bad
1.0 - 1.5 is worse, and
1.5+ probably requires urgent medical treatment.

Apologies if you already knew that; diabetes management varies around the world.

Ketone measurements are considered a core part of my management routine (if your sugars are high, or you are ill).

[Faltenreich]

I agree that it makes sense to add Ketones as additional category. I am currently overhauling Diaguard in #51 which allows the creation, editing and removal of categories. This should meet your requirement but will take a while until the overhaul has been completed.