Insert markdown when click on Add Delivery

[nasdan]

Implement insert evaluation markdown in Trainer module.

• Right now there is a dummy DeliveryPanelComponentunder ./src/pages/trainer/training/edit/components/panels/evaluation/deliveryPanelComponent.tsx.

Steps:

• Create a fork.

• Create new branch called feature/<issue_number>_<issue_title>(where issue_number is the id of this issue given by Github).

• The idea is insert the filled delivery title link into current markdown editor.

• When click on 'Save' button, insert title into markdown text area (./src/pages/trainer/training/edit/components/editor.tsx) a link like: [Test delivery title](url).

• Don't worry about the url value or delivery description, for now.

• The funtionality could be some similiar as toolbar link button.
  ./src/pages/trainer/training/edit/components/toolbar/buttons/toolbarMarkdownButton.tsx
  `./src/pages/trainer/training/edit/components/toolbar/groups/linksGroupComponent.tsx

• Important: Follow this work flow