Cyborgs: don't drop on down, spawn placeholders on container events

[whatston3]

About the PR

A fix for cyborg inventory management.

Instead of hand/dropped events, a borg's placeholder item for droppable module slots is spawned on container events (always raised). The placeholder is spawned and placed in the slot at the time of removal.

Additionally, borgs now do not drop their items when downed - their module items should be internal.

Why / Balance

Bug.

How to test

1. Spawn a service cyborg.
2. Start another client, become the cyborg, equip the module with the lighter, shaker and book bag.
3. On the first client, throngle the borg until it drops. It shouldn't drop its items.
4. Revive the borg. On the second client, drop your droppable items.
5. Try to pick up the borg's modules and drop them on the first client. You shouldn't get borg placeholders.
6. Remove the "- type: PreventDropOnDown" line from the cyborg definition.
7. Repeat 1-3. The borg will still drop its items, but it should have placeholders in their spots.

Media

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Breaking changes

Changelog

🆑

• fix: Borgs no longer drop their items when downed, and should spawn a placeholder item whenever a droppable item is removed.

[dvir001]

Should also add PreventDropOnDowned to NF Mob restriction later

[whatston3]

Should also add PreventDropOnDowned to NF Mob restriction later

Shouldn't need it if you don't have actual hands. Not sure if they do.

[dvir001]

Should also add PreventDropOnDowned to NF Mob restriction later

Shouldn't need it if you don't have actual hands. Not sure if they do.

They do, and its glue.