feat(data): use general template for all offers

With help of Object.keys (which is provided to the
template) make offers template general for different
price group types (which are academic or sport course
for now).

See discussions on !2

src/app/modules/data/elements/offers-in-list.component.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {Component, Input} from '@angular/core';
+import {SCAcademicPriceGroup, SCThingThatCanBeOfferedOffer} from '@openstapps/core';
+
+@Component({
+  selector: 'stapps-offers-in-list',
+  templateUrl: 'offers-in-list.html',
+})
+export class OffersInListComponent {
+  @Input() offers: Array<SCThingThatCanBeOfferedOffer<SCAcademicPriceGroup>>;
+}