Feature/same day exams display

[vitormpp]

Closes #437
Updated logic to identify and showcase all exams occurring on the same day as the next scheduled exam.
Adjusted rendering to display exams occurring on the same day as the next scheduled exam with additional information (such as start time and exam rooms).
Split the existing ExamCard class into three distinct classes: NextExamsWidget (designed to display both the next scheduled exam and the exams occurring on the same day), RemainingExamsWidget (handles the display of exams occurring after the next scheduled exam), and ExamCard (manages these specialized widgets).

Single next scheduled exam:

Multiple exams scheduled on the same day as the next exam:

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

Merging #1059 (8054160) into develop (17582d6) will decrease coverage by 0%.
Report is 2 commits behind head on develop.
The diff coverage is 2%.

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #1059   +/-   ##
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- Coverage       16%     16%   -0%     
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  Files          213     215    +2     
  Lines         6544    6549    +5     
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  Hits          1044    1044           
- Misses        5500    5505    +5     

[bdmendes]

Looking good, very clean code! Just a minor thing to go.

[thePeras]

✅ 🛫

[LuisDuarte1]

🚀