Add ordinal ª and º indicators

[sdalmonte]

This pull request adds the ordinal indicators ª and º.

character	Unicode value	symbol
ª	U+00AA FEMININE ORDINAL INDICATOR	ordinal.a
º	U+00BA MASCULINE ORDINAL INDICATOR	ordinal.o

[MDLC01]

For reference, those characters are documented in the Unicode Core Specification.¹ Notably, they do not seem to be included for compatibility reasons, which motivates their addition to Codex.

Footnotes

1. https://www.unicode.org/versions/Unicode17.0.0/core-spec/chapter-7/#G6207 ↩

[MDLC01]

You will also need to update the changelog in CHANGELOG.md

[MDLC01]

We are trying a new way to keep track of changes by maintaining the changelog in a separate shared document (https://typst.app/project/r2ChBGT9XWBoEhAKGM6icb). Feel free to drop the update to the changelog from this PR to prevent any further conflict.

[Enivex]

Would it make more sense to call them ordinal.f and ordinal.m? For reference, the names in HTML are ª and º, they are \textordfeminine and \textordmasculine in latex, and the unicode names also use feminine/masculine. I don't see a particularly good reason for typst to go against the grain here.

[MDLC01]

One of the advantages of using .a and .o is that it is more future-proof in case one day Unicode adds ordinal indicators for other languages that use different letters. For this reason, I am in favor of keeping .a and .o.

If we go for a more semantic name, I would be in favor of longer modifiers, such as .fem and .masc, if not .feminine and .masculine. For comparison, we already use similarly long modifiers, e.g., gender.female.

[Enivex]

One of the advantages of using .a and .o is that it is more future-proof in case one day Unicode adds ordinal indicators for other languages that use different letters. For this reason, I am in favor of keeping .a and .o.

I'm not sure I buy that argument. They could equally well add ordinal symbols that visually look the same, but carry different semantic information.

If we go for a more semantic name, I would be in favor of longer modifiers, such as .fem and .masc, if not .feminine and .masculine. For comparison, we already use similarly long modifiers, e.g., gender.female.

I don't think fem and masc would be very consistent with other naming, so in that case I'd prefer the full name

[MDLC01]

Then maybe we can have a consensus on .feminine and .masculine?