branch to merge all card branches into

[kainacrow]

This PR handles various additions:

1. A supplier is always required for a contract.

2. Creating a contract via a CSV import. If a supplier is not present, then a contract will not be created when importing via a CSV. If a contract already exists it won't be created again. If a supplier already exists it won't be created again. This pops up via a modal - but the page does require a refresh to be loaded. I'm also not sure why the content missing part shows up but I looked over a tutorial for building modals using turbo as I was unfamiliar and that's as far as I was able to get.

3. The ability to click on a supplier name on the contracts table and be taken to a dashboard where it will show all the contracts associated with that specific supplier.

4. On the supplier view, an average contract value will be displayed in the right corner.

5. I added functionality for suppliers to not be created if one already exists. I did this by scrubbing the empty space before/after the string then removing blank spaces within, then removing "LLC" as that is how some duplicates were showing up

6. I removed N+1 queries by using eager loading to fetch the associated contract_owner and supplier for contracts and loading contracts and their contract_owners for the supplier

7. I also added specs for the controllers and specs for the new model and factories as well.