Edit and delete customers

[enriquezrene]

When customers are created, they are shown in a grid component as the image in the issue #78 shows. We need to implement the required code to edit and delete customers as follows:

Delete customers

• The user clicks on the delete icon over the raw, and the element is deleted right there with no confirmation. A message indicating the customer has been removed is displayed.

Edit customers

• The user clicks on the edit icon in the grid or clicks on the raw directly.
• The customer information is loaded in the tabs located at the bottom of the screen.
• The user can edit whatever information they want as types of technologies and projects as well.

Acceptance Criteria

• All the implemented code needs to have at least 80% code coverage
• The edit and delete flow needs to work as it's mentioned before