DLG Game Master Additions

Additions for the Arma Reforger Game Master editor and for mission makers in Workbench.

REQUIRED ON SERVER AND CLIENTS
Since this version the mod contains a replicated, persistent system (Map Entity Hider). The server and all players need the mod.

=== Map Entity Hider ===
A placeable system that hides map objects inside an area. Place it in Workbench (World Editor) or as Game Master (Content Browser > Systems, or search "Map Entity Hider"). Delete it and everything comes back.

- Circle (radius) or rectangle (width x length, rotate the hider to turn it)
- Choose what to hide: buildings, trees, bushes and plants, rocks, walls and fences, wrecks, power lines, other props, and furniture inside hidden buildings
- Hidden objects are really gone: no collision, no interaction prompts, no lights or sounds, no indoor audio and no indoor lighting where a building stood
- AI can walk through cleared areas (the navmesh is rebuilt on the server)
- Works on every machine, including players who join later
- Game Master: radius, size and types can be changed in the hider's attributes; the area is shown while the editor is open
- Game Master session saves keep the hiders and their settings
- Overlapping hiders work together, large areas are processed over several frames
- Roads, bridges and ground decals are never hidden

Works with vanilla terrains and with terrains using the same folder layout; Gulfcoast Islands is supported. Mission makers can add rules for other maps (DLG_MapEntityHiderTypeRules config).

=== Entity list sorting and filtering ===
The Game Master entity list (bottom right, and its full dialog) gets:
- a search box (by name)
- sorting: name, distance to the camera, faction, damage
- a faction filter
- a "Nested" toggle to also list soldiers in groups and parts of compositions

=== Compatibility ===
- The Map Entity Hider saves its settings through an override of the vanilla config Configs/Systems/Persistence/Configuration/Editor/EditableEntity.conf. Another mod that overrides the same file will conflict with it (whichever loads last wins), which can break saving of the hider settings or of the other mod.
- Everything else is added through scripts (no other vanilla configs or prefabs are replaced).
- Texts are localizable (string table); currently English only.

=== Multiplayer ===
Built for multiplayer (replicated settings, late joiners, server-side navmesh). Tested in Workbench; feedback from dedicated servers is welcome.