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/borderless.cpp

@@ -9,7 +9,7 @@
 // Mouse positions are mapped back from that rectangle to game pixels, both in
 // GetMouseClientPos (polled by the game) and in mouse window messages.
 //
-// sacred_re.ini:
+// sacredK.ini:
 //   [borderless]
 //   Enabled=1        ; 0 = original behaviour
 //   IntegerScale=0   ; 1 = scale by whole multiples only (sharper, larger bars)