Refactor MudPaper component styling across various features for consistency

Updated the MudPaper component styling in multiple files to use a consistent padding class of "pa-3 pa-md-6" instead of "pa-6". This change enhances the visual consistency of the UI across the Calendar, Events, Students, and Teams components, improving the overall user experience.

WebApp/Components/Features/Teams/Assignment.razor

@@ -21,7 +21,7 @@
     </ActionButtons>
 </PageHeader>
 
-<MudPaper Elevation="2" Class="pa-6 mt-4">
+<MudPaper Elevation="2" Class="pa-3 pa-md-6 mt-4">
     <MudGrid>
         <MudItem Style="width:160px;">
             <MudNumericField @bind-Value="_parameters.TeamSizeLimit"
@@ -117,7 +117,7 @@
     <MudButton Class="ma-3" OnClick="Solve" Variant="Variant.Filled" Color="Color.Primary" Disabled="@_isSolving">Solve</MudButton>
 </MudPaper>
 
-<MudPaper Elevation="2" Class="pa-6 mt-4">
+<MudPaper Elevation="2" Class="pa-3 pa-md-6 mt-4">
     <MudGrid>
         <MudItem xs="12" lg="8">
             <MudText Typo="Typo.h5" Class="mb-4">Students</MudText>