Rename project to sacredK

sacred_re.dll/.exe/.ini/.log/_crash files are now sacredK.*; inventory saves
with the old "sacred_re.inventory" format id still load.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/mods/widescreen.cpp

@@ -8,7 +8,7 @@
 // 1024x768 layout, and set the variables from the render size.
 // See docs/widescreen.md.
 //
-// sacred_re.ini:
+// sacredK.ini:
 //   [widescreen]
 //   Enabled=1
 //   Height=768  ; world pixels visible vertically (768 = original look);