feat: all pages can have same intro, exams guide

guide/semesters/masters.md

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+<!--@include: ../../notice.md-->
+
 # Masters
 ::: info
 This section will be expanded once I reached the masters myself

guide/semesters/semester-planning.md

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+<!--@include: ../../notice.md-->
+
 # Semester Planning
 Whenever the course registration opens, make sure that you know what you want to do next semester,
 and ideally what you want to do the next few semesters.
@@ -6,6 +8,15 @@ For planning, [StudyPlanner](https://www.studyplanner.ch/) may come in very hand
 
 For picking courses, you may want to read reviews of courses, which you can do on [CourseReview](https://coursereview.ch).
 
+## What if I overcommitted?
+You can drop courses *at any time* (apart from the basics courses, whose exams you have to sit in one go).
+Thus, if you have bitten off a bit more than you can chew, drop one of the extra courses such that you are able to focus on the more important courses.
+
+If you have gone past the official de-registration period, you can simply stop attending the course, if it doesn't have graded attendance.
+In that case, don't sign up to the exam, and if you already have, there typically is a de-registration period for that as well, which for end of term examinations
+is typically about two or three weeks before the end of the semester.
+If you have also missed that, in most cases you have to contact the teaching team of the course, ideally on the day before the exam.
+
 
 ## Requirements for Bachelor
 The CS Bachelor can be a bit confusing in terms of its requirements. I explained it as I would have hoped it had been to me when I started in HS24:

guide/semesters/semester1.md

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+
 # Semester 1
 Chances are that if you are reading this, you are starting with ETH, so here a few important remarks:
 - Make sure to keep up with the course content. Catching up after the semester ended is hard

guide/semesters/semester2.md

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+
 # Semester 2
 Semester 2 is in my opinion (and the one of many people) the easiest semester in the entire Bachelor's programme for Computer Science.
 This is why I would highly recommend doing at least a GESS subject in this semester already.

guide/semesters/semester3.md

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+
 # Semester 3
 Semester 3 is an interesting semester in terms of the courses, ranging from well taught (Analysis II and TI) to atrocious (NumCS).
 The same applies also to Semester 4, but the courses there are easier for many people.

guide/semesters/semester4.md

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+
 # Semester 4
 Semester 4 is typically considered the second easiest semester and I agree.
 While FMFP can be a bit of a challenge initially, the exams are very predictable.

guide/semesters/semester5-onwards.md

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+
 # Semester 5 and onwards
 ::: info
 Will be expanded in the future, when I have completed this part of my studies