Landmine stepoff (#22962)

* make landmine work on stepping off

* update methods naming

* made both step modes possible

* updated stepoff event raise to not interfere with game physics internals

* added comments

* figuring out how audiosystem works

* added beep sound effect, updated how stepoff trigger works to make it more consistent

* updated source in attributions.yml

* made stepoff working every time

* introduced suggested changes

* updated janitor's WetSignMine to have audio

* made cleaner events and bashing my head at OnEndCollide event raise

* inverted conditional where applicable

* review

---------

Co-authored-by: Yurii Kis <yurii.kis@smartteksas.com>
Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Server/LandMines/LandMineComponent.cs

@@ -1,6 +1,13 @@
-namespace Content.Server.LandMines;
+using Robust.Shared.Audio;
+
+namespace Content.Server.LandMines;
 
 [RegisterComponent]
 public sealed partial class LandMineComponent : Component
 {
+    /// <summary>
+    /// Trigger sound effect when stepping onto landmine
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public SoundSpecifier? Sound;
 }