Implement creating qualifications (#17)

Co-authored-by: Phan Huy Tran <p.tran@neusta.de>
Reviewed-on: #17
Reviewed-by: Constantin Simonis <constantin@simonis.lol>

src/app/create-qualification/create-qualification.component.html

@@ -0,0 +1,5 @@
+<form [formGroup]="qualificationForm" (ngSubmit)="create()">
+  <label for="skill-input">Skill</label>
+  <input id="skill-input" type="text" formControlName="skill">
+  <button type="submit">create</button>
+</form>