Update padding for MudPaper components across various features

Increased padding from 'pa-4' to 'pa-6' for MudPaper components in Events, MeetingSchedule, Students, and Teams features to ensure consistent styling and improved visual spacing.

WebApp/Components/Features/Students/Edit.razor

@@ -25,7 +25,7 @@
         <DataAnnotationsValidator/>
         <MudGrid>
             <MudItem xs="12" sm="7">
-                <MudPaper Class="pa-4">
+                <MudPaper Elevation="2" Class="pa-6">
                     <MudTextField T="string" Label="First Name" @bind-Value="Student.FirstName" For="@(() => Student.FirstName)"></MudTextField>
                     <MudTextField T="string" Label="Last Name" @bind-Value="Student.LastName" For="@(() => Student.LastName)"></MudTextField>
                     <MudTextField T="string" Label="Email Adress" @bind-Value="Student.Email" For="@(() => Student.Email)"></MudTextField>

WebApp/Components/Features/Students/EventRanking.razor

@@ -18,7 +18,7 @@
 else
 {
     <MudStack Spacing="4">
-        <MudPaper Elevation="2" Class="pa-4">
+        <MudPaper Elevation="2" Class="pa-6">
             <MudText Typo="Typo.h5" Class="mb-4">Students by Rank</MudText>
             <MudTable Items="_students" Hover="true" Striped="true" Breakpoint="Breakpoint.Sm" LoadingProgressColor="Color.Info">
         <HeaderContent>
@@ -64,7 +64,7 @@ else
             </MudTable>
         </MudPaper>
 
-        <MudPaper Elevation="2" Class="pa-4">
+        <MudPaper Elevation="2" Class="pa-6">
             <MudText Typo="Typo.h5" Class="mb-4">Events by Student</MudText>
             <MudTable Items="_eventStudentRankings" Hover="true" Striped="true" Breakpoint="Breakpoint.Sm" LoadingProgressColor="Color.Info">
         <HeaderContent>

WebApp/Components/Features/Students/Index.razor

@@ -15,7 +15,7 @@
     </ActionButtons>
 </PageHeader>
 
-<MudPaper Elevation="2" Class="pa-4">
+<MudPaper Elevation="2" Class="pa-6">
     <MudDataGrid T="Student"
                  ServerData="ServerReload"
                  @ref="_dataGrid"

WebApp/Components/Features/Students/Registration.razor

@@ -19,7 +19,7 @@
     </ActionButtons>
 </PageHeader>
 
-<MudPaper Elevation="2" Class="pa-4">
+<MudPaper Elevation="2" Class="pa-6">
     <MudText Typo="Typo.body2" Class="mb-2">
         <MudIcon Icon="@AppIcons.Captain" Size="Size.Small" /> = Team Captain
     </MudText>