add Brazilian grades

[musoke]

https://en.wikipedia.org/wiki/Grade_(climbing)#Brazilian
https://www.cap.com.br/post/sistema-brasileiro-de-gradua%C3%A7%C3%A3o-de-vias-de-escalada

todo:

• BrazilianCrux scale: done in feat: add BrazilianCrux scale #158
• Add scale BrazilianGeneral  #161
• Add scale BrazilianExposure #162
• Add scale BrazilianDuration #163
• hybrid grades #169

[musoke]

We have started Brazilian grades, but there are more layers

[musoke]

https://github.com/OpenBeta/sandbag/pull/158/files#r1388446690

Yeah, to make it as brief as possible: the brazilian grade standard actually has two grades for any route that IS NOT a single pitch/sports route:

the general grade of the route
the grade of the hardest move (crux)

for the general grade, an arabic number is used: i.e. 6th
for the crux grade, it's roman. so a route that is generally graded in 5th grade but has a 6sup grade crux, it reads like:
5º 6sup5º VIsup

for sports climb/single pitch, we use only the second form because there's no point in having two assignments.
I have focused my implementation in just the second form. However, later we could expand to enable the whole aspect of the brazilian specification, which has more to it: duration, aid grade, exposition grade.

[musoke]

https://github.com/OpenBeta/sandbag/pull/158/files#r1388568954

I have focused my implementation in just the second form. However, later we could expand to enable the whole aspect of the brazilian specification, which has more to it: duration, aid grade, exposition grade.

Yes, makes sense to start with the common case.

We will need a system to handle this for other scales too. I haven't worked out the details, but I plan to allow hybrid/combined grades that combine complementary scales. For example, a British trad grade could be constructed from a grade on each of the adjectival and technical scales, e.g. BritishAdjectival("E6") + BritishTechnical("6a"). Likewise, an aid route with mandatory climbing could get a grade of 5.8 A1 , which would be parsed as Aid("A1") + YosemiteDecimal("5.5").

If I understand the spec you shared, most Brazilian grades would be represented by a combination of

BrazilianGeneral ~ [1º, 2º, 3º, 4º, 5º, 6º, 7º, 8º,…]
BrazilianTechnical ~ ['I', 'Isup', 'II', 'IIsup',...] <- this PR
BrazilianAid == Aid?
BrazilianDuration ~ ['D1', 'D2', ..., 'D7']
BrazilianExposure ~ ['E1', 'E2', ..., 'E5']

Does this general idea make sense for Brazilian grades?