Add weather to the terminal watch face

[JustScott]

This was originally part of #2001 but is being split into its own PR without the non-weather changes to give it the ability to be merged without those changes.

This PR adds the current temperature and condition to the terminal watch face with dynamic coloring. In it's current state many of the conditions will overflow off the right side of the screen, but this will be fixed in #2134 which has already been added to the 1.16.0 milestone.

[github-actions]

Build size and comparison to main:

Section	Size	Difference
text	373280B	464B
data	948B	0B
bss	22536B	0B

[mark9064]

Looks good! Thanks for splitting this out, definitely easier to review now - I get that more branches is more work for you

So currently there are 4 "bands", as the weather app uses an LVGL table which requires a "style" for every colour used (from what I can see, maybe there are some workarounds). Would it makes sense to use a continuous colour scale (maybe somewhat like #1964) in this scenario? It might be better to stick to the colour bands for consistency, I'm not sure. Either way I think is might be a good opportunity to pull out temperature->colour conversion into the temperature class (support both bands and continuous or just bands), as it's probably not a good idea to duplicate colour conversion code across the codebase