feat: gl-datepicker component
This merge request
- Implements a datepicker component based on Pikaday which is the datepicker library used in gitlab-ce.
- Adds a datepicker example that will be used in design.gitlab.com.
- Add two storybook stories.
- Two small styles that position the datepicker trigger on top of the datepicker field. These are not the component styles. Styling will be implemented in #294 (closed)
Edited by 🤖 GitLab Bot 🤖