Implementation of new horn graphic by Amelia

[brightrim]

A new horn graphic has been provided by Amelia for the instrument version, to allow a distinct difference between the horns looted from cattle and to allow them to be stackable like other resources.

To do:

• [x] Add the new horn graphic to the resources repository
• [x] Add a new item in the resources repository item list for the new horn material, using the old horn graphic.*
• [x] Assign the old horn item the new horn graphic in the resources repository item list.
• [x] Add the new horn material to the database for drops by cattle, removing the old item ID for horns there in the process.
• [x] Change any recipes requiring the old horn ID as material to use the new horn ID
• [x] Adjust the recipe, required level and materials for the new horn instrument based on similar instruments in carpentry
• [x] Scour the scripts and database drops for any other mention of the old horn, to see if it should remain a horn instrument or swapped to material where fitting.

*Keeping the existing horn item as the instrument in case someone has a perfect horn with a custom description as an instrument etc.

[brightrim]

Testing thread opened: https://discord.com/channels/401855954272124940/1211345203060019261