Migrate document to YAML with explicit chapter/paragraph/list numbering

[Iipin]

diffPDF found no differences between the new document and the old one.
Nice potential follow-ups:

• There are some LaTeX constructs hardcoded (e.g. \subsections), it'd be nice if we could express them in a better way,
• Adjust the workflows,
• Get rid of the pandoc,
• After the above: clean up the LaTeX template file.

[m4tx]

Some downsides:

1. We can't easily generate docx files anymore
2. YAML format is a bit harder to read and write than the old Markdown files

We should re-enable CI (preferably using GH actions) before merging this.

[m4tx]

I'm thinking, is it necessary to have distinction text/list? In YAML, these are already two distinct data structures, so maybe we can drop these tags and make the format less verbose?

[Iipin]

yeah, we can – I automatically went for a tagged union so that we add another cases but no other cases came up. xd ptal

[m4tx]

tbh now that I'm looking at this, it's hard to spot lists in this 👀 At this point, I'm fine with either version.

[Iipin]

Some downsides:

1. We can't easily generate docx files anymore

2. YAML format is a bit harder to read and write than the old Markdown files

We should re-enable CI (preferably using GH actions) before merging this.

1. docx files were added for mr. prawnik anyway so I figured we don't need them anymore
2. true

[m4tx]

@Iipin what's the current status of this?

[Iipin]

@m4tx ready for rereview, PTAL