Add new concealed mines

[ErhardSteinhauer]

About the PR

Replacement for upstream mine disguised as wet floor sign. New mines are less lethal (healthy unarmored target will not be put into crit by the explosion) and have both visual (blinking lights and pocking out wiring) and audio (ticking sounds) cues that can help player to spot a mine in advance. Concealed mine sprites are randomized.

Why / Balance

More options for mappers, also makes mines less punishing.

How to test

• Spawn newly added mines (look for the ones with Frontier suffix), step on them, get crippled, repeat.

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
🆑 erhardsteinhauer

• add: Added new mines disguised as plushies, boxes and trash.

[github-actions]

RSI Diff Bot; head commit fe5401d merging into fe5095e
This PR makes changes to 1 or more RSIs. Here is a summary of all changes:

Resources/Textures/_NF/Objects/Weapons/Bombs/ied_overlay.rsi

State	Old	New	Status
ied_display			Added
ied_light			Added
ied_wiring1			Added
ied_wiring2			Added
ied_wiring3			Added
ied_wiring4			Added
ied_wiring5			Added
ied_wiring6			Added
mask_null			Added

Edit: diff updated after fe5401d

[Clay500z]

Poor hampter

[Houtblokje]

Scary

[BluCottonCandy]

Please stop making expeditions so much harder and deadly with no positives...

[the-hivequeen]

Please stop making expeditions so much harder and deadly with no positives...

These are already in the game, they're making them easier to see.....

[BluCottonCandy]

Please stop making expeditions so much harder and deadly with no positives...

These are already in the game, they're making them easier to see.....

No, currently just regular land mines exist.
We used to have wet floor sign mines (they went inert at some point) and now this is adding a new landmine variant that is only going to serve to make expeds even more annoying.

Given, that new guy you hired, will grab the landmine killing you all.