Feature: Adding recipe templates to print recipes.

Feautre: Recipe export to xlsx
Chore: Python 11 style type annotations
Chore: Moved to sqlalchemy 2.0
Chore: Minimum python is 3.11
Fix: Fix nullability of a lot of fields in the database.

overlord/src/app/client/client-list-resolver.service.ts

@@ -1,5 +1,4 @@
 import { Injectable } from '@angular/core';
-import { Resolve } from '@angular/router';
 import { Observable } from 'rxjs/internal/Observable';
 
 import { Client } from './client';
@@ -8,7 +7,7 @@ import { ClientService } from './client.service';
 @Injectable({
   providedIn: 'root',
 })
-export class ClientListResolver implements Resolve<Client[]> {
+export class ClientListResolver {
   constructor(private ser: ClientService) {}
 
   resolve(): Observable<Client[]> {