Implement Marks Module

Acceptance Criteria

• Marks can be shown in overview
• Marks average and ECTS points can be shown
• Marks can be created
• Marks can be edited
• Marks can be ordered and filtered according to defined keys

/cc @KajHabegger

changed milestone to %M4 - Architecture

added Sprint-03 label

added Ready label

changed title from Implement View Marks Overview to Implement Marks Overview

added #51 (closed) as child task

added #52 as child task

added #53 (closed) as child task

added #54 (closed) as child task

added #55 (closed) as child task

added #56 as child task

changed title from Implement Marks Overview to Implement Marks Module

changed time estimate to 2d

changed the description

assigned to @lukas

changed the description

added #69 (closed) as child task

added #72 (closed) as child task

created branch 50-marks-create-edit-views to address this issue

added 2h of time spent

added 2h of time spent