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>

docs/options.md

@@ -3,7 +3,7 @@
 Request (2026-10-18): the settings screen gets three tabs: *Allgemein*,
 *Beute* (loot filter; first iteration: the game's loot options moved there
 from the common page) and *Tastenbelegung* (key bindings, so far only
-settable in `sacred_re.ini`). Code: `src/mods/options.cpp`; bindings in
+settable in `sacredK.ini`). Code: `src/mods/options.cpp`; bindings in
 `src/mods/input.cpp`.
 
 ## The window (cUI_Options)
@@ -42,7 +42,7 @@ settable in `sacred_re.ini`). Code: `src/mods/options.cpp`; bindings in
   a box captures the next key press (`input::SetKeyCapture`, swallowed before
   the game sees it): Esc cancels, Backspace unbinds, a bindable key is taken
   (and removed from any other action). The page works on a copy loaded when
-  the window opens; OK (`0x717460`) saves it to `[keys]` in `sacred_re.ini`,
+  the window opens; OK (`0x717460`) saves it to `[keys]` in `sacredK.ini`,
   Cancel drops it.
 - Movement keys (W/A/S/D) are bindings now (`MoveUp/Left/Down/Right`);
   `mods/wasd.cpp` polls the bound keys.