Feat(climate) - chart-specific tool configuration

Description

Main Changes

Whilst running the workshop it became obvious that using the line-tool on climate charts drew some confusion going through the process of counting points above/below line and drawing conclusions. For rainfall graphs the focus is usually on exceedence (points above) but start date usually focus is on whether the season starts 'before' (points below).

Previously we have tried to just flip the colours for the specific graph, however the code to do this was quite confusing and not applied consistently when adding new graphs.

So instead this PR tries to make line and probability tools more configurable on a per-chart basis, including specific colours of points above/below, labels to apply and ordering on the page.

Additional changes

Remove excess padding from line tool number input
Mark chart axes and labels for translation (previously not translated)

Discussion

Now that the tools are easier to adapt it would be good to confirm the exact desired behavior (in terms of colors, text, layout on page etc.)

Preview

https://picsa-extension-toolkit--pr159-feat-climate-tool-up-mb13rzr6.web.app/

Screenshots / Videos

Before - tools would typically only reference points above the line and infer conclusion (incorrectly in case of start date) picsa app_climate_site_petauke_view=start(Picsa) (2)

After - tools more flexible to change colours, show info for both above/below and change label relevant to context localhost_4200_climate_site_petauke_view=start(Picsa)

localhost_4200_climate_site_chipata_view=start(Picsa)

Demo video

Chipata.webm

e-picsa / picsa-apps