Burglin' Gnomes: finalize fix, docs, and BepInEx install support

Final tuned values baked in as defaults: HudScale=0.8, WorldLabelScale=0.8.

- install.sh gains METHOD=bepinex: installs BepInEx from vendor + the prebuilt
  plugin, with a matching uninstall that leaves BepInEx/ alone (other mods may
  depend on it). Success banner is now method-aware.
- Ship the prebuilt plugin DLL so users don't need a .NET SDK.
- Per-game README documenting why the camera is deliberately untouched
  (orthographic, constant orthographicSize = already Hor+), the two-canvas UI
  problem, tuning, and where the plugin log actually lives.
- Root README lists both games and both fix methods.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

games/BurglinGnomes/plugin/UltraWideFix.cs

@@ -57,14 +57,14 @@ namespace BurglinGnomes.UltraWideFix
                     "Keep at 1 for ultrawide; lower values re-introduce width scaling and " +
                     "cramp the layout vertically.",
                     new AcceptableValueRange<float>(0f, 1f)));
-            _hudScale = Config.Bind("HUD", "HudScale", 0.85f,
+            _hudScale = Config.Bind("HUD", "HudScale", 0.8f,
                 new ConfigDescription(
                     "HUD size multiplier. Below 1 shrinks the HUD AND gives the layout more " +
                     "logical room, which is what cures overlapping text. 1 = stock size.",
                     new AcceptableValueRange<float>(0.4f, 1.5f)));
             _designHeight = Config.Bind("HUD", "DesignHeight", 1080f,
                 "The game's design reference height. Do not change unless you know why.");
-            _worldScale = Config.Bind("World", "WorldLabelScale", 1.0f,
+            _worldScale = Config.Bind("World", "WorldLabelScale", 0.8f,
                 new ConfigDescription(
                     "Size multiplier for in-world labels (nameplates). At 32:9 you see twice " +
                     "as much world, so more labels are on screen and can collide; lower this " +