Chore: Upgraded to angular 15

Chore: Moved from angular/flex-layout to Tailwind
Chore: Upgrade completed

overlord/src/app/role/role-detail/role-detail.component.html

@@ -1,5 +1,5 @@
 <div class="flex flex-auto flex-row justify-around content-center items-center lg:max-w-[50%]">
-  <mat-card class="flex-auto">
+  <mat-card appearance="outlined" class="flex-auto">
     <mat-card-title-group>
       <mat-card-title>Role</mat-card-title>
     </mat-card-title-group>

overlord/src/app/role/role-list/role-list.component.html

@@ -1,4 +1,4 @@
-<mat-card>
+<mat-card appearance="outlined">
   <mat-card-title-group>
     <mat-card-title>Roles</mat-card-title>
     <a mat-button [routerLink]="['/roles', 'new']">