added multiple things

[bymedeu]

Since last time i have:

• renamed every "Maths" folder in "Maths PC" since a new maths subject was added last year, and will soon be on past exams
• added almost every subject of the s3 2028 midterm, exept "Ethique", English, "THLR"
• added the correction of both math subjects
  I might have forgotten to pull and force merge some things, so not sure if your last commit is still on my branch

[bymedeu]

Seems like the compress PDF files commit worked :)

[matiboux]

Wow this was a pain to review (and I procrastinated a lot, I admit — damn, a month already?).

Next time, please update (merge) your branch with upstream (Epidocs:master) for more readable changelogs. Currently, the files changelog shows new changes as well as changes from your last merged PR because it was not updated since. TLDR: Too much diff with upstream branch.

However, that's not the issue preventing me from merging right now, which is:

Upon review, I've noticed the large added file S3/Midterms/Algo/2028/midterm-2028-s3-algo-subject.pdf. Please compress this file! You can use the provided script in the repo, or external online compression tools.

Still, thank you for your contribution!