Code review suggestions

[tsevdos]

All the features are working fine and the structure / code of the project is really good! I also love tailwind by the way...

Suggestions for implementation:

• Fix all linting errors (easy)
• Clear the "Add new course" form after successfully add a new course (easy)
• Check if you can combine the functionality of the "Edit Course" component with the "Add New Course" component. You can use the same form, in the first case the "initial values" will be your current course data, and in the second one it will be the same data (abject) with empty values (hard)