Rename package/app to FeNigma consistently

- src/ironnest_assist/ -> src/fenigma/
- run.sh invokes -m fenigma.app
- APP_ID: eu.dominik-roth.IronNestAssist -> eu.dominik-roth.FeNigma
- window title, IronNestApp class -> FeNigmaApp
- __init__.py docstring, README pgrep hint updated

IRON NEST (the game's own name, e.g. NEST_KEYWORD in ocr.py) is left
untouched, only our own project/app naming changed. Verified: clean
import under the new module path, install.sh still builds the venv
correctly, and the OCR regression sweep (9 known screenshots) still
passes.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/fenigma/__init__.py

@@ -0,0 +1 @@
+"""FeNigma: screen-reading helper for IRON NEST: Heavy Turret Simulator."""

src/fenigma/app.py

@@ -1,4 +1,4 @@
-"""IronNest Assist — GTK4/libadwaita app entry point.
+"""FeNigma: GTK4/libadwaita app entry point.
 
 Layout: a row of category dropdowns on top (+ a universal clipboard-fetch
 button), the map/grid filling the center. Coordinates can be set by exact
@@ -31,7 +31,7 @@ from .grid_widget import GridCanvas  # noqa: E402
 from .models import Board, Location, Target, TargetType  # noqa: E402
 from .shells import Shell  # noqa: E402
 
-APP_ID = "eu.dominik-roth.IronNestAssist"
+APP_ID = "eu.dominik-roth.FeNigma"
 
 
 def _apply_location(obj, location: Location) -> None:
@@ -147,7 +147,7 @@ def _install_css() -> None:
 
 class MainWindow(Adw.ApplicationWindow):
     def __init__(self, app: Adw.Application) -> None:
-        super().__init__(application=app, title="IronNest Assist")
+        super().__init__(application=app, title="FeNigma")
         self.set_default_size(1100, 750)
         _install_css()
 
@@ -861,7 +861,7 @@ class MainWindow(Adw.ApplicationWindow):
         rebuild()
 
 
-class IronNestApp(Adw.Application):
+class FeNigmaApp(Adw.Application):
     def __init__(self) -> None:
         super().__init__(application_id=APP_ID)
 
@@ -873,7 +873,7 @@ class IronNestApp(Adw.Application):
 
 
 def main() -> int:
-    app = IronNestApp()
+    app = FeNigmaApp()
     return app.run(None)
 
 

src/ironnest_assist/__init__.py

@@ -1 +0,0 @@
-"""ironnest-assist: screen-reading helper for IRON NEST: Heavy Turret Simulator."""