Add embed message support to Discord bot and update appeal flow to use embeds for Discord notifications

frontend/src/app/pages/forms/appeal/appeal.component.ts

@@ -187,7 +187,7 @@ export class AppealComponent implements OnInit, OnDestroy, AfterViewInit {
       if (!result.verified_mail) {
         throw new Error('Mail not verified');
       }
-      this.router.navigate(['/form/sent'], {
+      this.router.navigate(['/forms/sent'], {
         state: {message: result.message}
       }).then();
     })

frontend/src/app/pages/forms/sent/sent.component.ts

@@ -1,4 +1,4 @@
-import {Component, OnInit} from '@angular/core';
+import {Component, inject, OnInit} from '@angular/core';
 import {Router} from '@angular/router';
 import {HeaderComponent} from '@header/header.component';
 
@@ -13,9 +13,7 @@ import {HeaderComponent} from '@header/header.component';
 })
 export class SentComponent implements OnInit {
   protected message: string = "The form is completed and has been sent";
-
-  constructor(private router: Router) {
-  }
+  private router: Router = inject(Router)
 
   ngOnInit() {
     const navigation = this.router.getCurrentNavigation();