Add Consumables concept

[eamonnlambda]

Hi,

I saw in #53 that the project may be open to the concept of a Consumable. I implemented a majority of the functionality (still changes to come for QoL, but the basis is there), and wanted to bring this back & make sure that I have gone down the correct path for implementation. Is this the direction the modifications should go/does everything look good so far?

Added:

• Consumable
• Consumable Type

Consumable Fields:

• Consumable Type
• Manufacturer
• Quantity
• Alert At Quantity (Send out an alert if the stored quantity of Consumables falls below this amount)
• Location

Consumable Type Fields:

• Name
• Part Number
• Manufacturer
• Slug
• Description

TODO (for me):

• ~~Add easy increment/decrement quantity for Consumables~~ Completed
• Implement some form of alerting when alert_at_quantity is reached
• Adding a tab for Consumables on the Location page (much like the tab for Assets)
• Loads of testing