Add add button and form for a new item. Add validation to the edit form component

src/app/app.component.html

src/app/app.component.scss

src/app/app.component.ts

src/app/app.routing.module.ts

src/app/components/menu/menu.component.html

src/app/components/menu/menu.component.ts

...nents/organizations/edit/organization-form.component.html

...nents/organizations/edit/organization-form.component.scss

...ponents/organizations/edit/organization-form.component.ts

...omponents/organizations/list/organizations.component.html

...omponents/organizations/list/organizations.component.scss

src/app/models/organization.model.ts

src/app/services/organization.service.ts

src/environments/environment.ts

src/index.html

src/styles.scss