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/Events/Edit.razor

@@ -32,7 +32,7 @@
     <ValidationErrorDisplay Errors="_validationErrors" />
 
     <MudStack Spacing="4">
-        <MudPaper Elevation="2" Class="pa-6">
+        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
             <MudText Typo="Typo.h5" Class="mb-4">Basic Information</MudText>
             <MudGrid Spacing="3">
                 <MudItem xs="12" sm="6">
@@ -56,7 +56,7 @@
             </MudGrid>
         </MudPaper>
 
-        <MudPaper Elevation="2" Class="pa-6">
+        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
             <MudText Typo="Typo.h5" Class="mb-4">Event Details</MudText>
             <MudGrid Spacing="3">
                 <MudItem xs="12">
@@ -74,7 +74,7 @@
             </MudGrid>
         </MudPaper>
 
-        <MudPaper Elevation="2" Class="pa-6">
+        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
             <MudText Typo="Typo.h5" Class="mb-4">Team Configuration</MudText>
             <MudGrid Spacing="3">
                 <MudItem xs="12">
@@ -95,7 +95,7 @@
             </MudGrid>
         </MudPaper>
 
-        <MudPaper Elevation="2" Class="pa-6">
+        <MudPaper Elevation="2" Class="pa-3 pa-md-6">
             <MudText Typo="Typo.h5" Class="mb-4">Competition Details</MudText>
             <MudGrid Spacing="3">
                 <MudItem xs="12">