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/recipe-template/recipe-template.service.spec.ts

@@ -0,0 +1,17 @@
+import { HttpClientModule } from '@angular/common/http';
+import { inject, TestBed } from '@angular/core/testing';
+
+import { RecipeTemplateService } from './recipe-template.service';
+
+describe('RecipeTemplateService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      imports: [HttpClientModule],
+      providers: [RecipeTemplateService],
+    });
+  });
+
+  it('should be created', inject([RecipeTemplateService], (service: RecipeTemplateService) => {
+    expect(service).toBeTruthy();
+  }));
+});