feat: add custom table borders and column alignment

[vihuna]

Allow some few customization options for table borders and column alignment.

• For custom borders: adds classes border-<position> and heavy-border-<position>, being position one of the values, top, right, bottom, left.

• For custom column alignment: adds classes l1-l12, c1-c12, r1-r12.

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Name	Status	Preview	Comments	Updated (UTC)
latex-css	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 20, 2023 10:18pm

[vincentdoerig]

Love the idea, it almost feels like using the tabular environment! Have a look at the few comments I made and let me know what you think

[vihuna]

Some comments:

• Because the name conventions, now I also don't like the class names for column aligment; what about something like this?: col-n-l, col-n-c, col-n-r, for n = 1, ..., and left, center, right.

• Because the names have changed, the commit message is outdated. ¿Should I make a force push?

[vincentdoerig]

• Yes I agree, using col-n-l, col-n-c, col-n-r would make sense
• I'll squash and merge once complete and will add the description from your first commit message using the updated class names so no need for you to force push