Add "add" button, "delete" button to ambulance/hospital equipment tables

[juh079]

When viewing the equipment for an ambulance or hospital, we can edit the equipment as shown: e.g. https://cruzroja.ucsd.edu/en/equipment/holder/update/14

We would also like to have an "add" and "delete" button.

2 ways to approach add button:

1. dynamically update table without reloading the page.
2. link to a new page or popup, then redirect back to equipment page when updating.

2 ways to approach delete button:

1. dynamically update table without reloading the page.
2. make the entry inactive