Add web-based save editor for "Reksio i Czarodzieje"

- Implemented a local web server using http.server to serve the save editor.
- Created a user interface with HTML, CSS, and JavaScript for managing game slots and editing save files.
- Added API endpoints for retrieving slot information, overview, and raw data for editing.
- Implemented functionality for saving changes back to the game files.
- Added tests for ARR and DTA formats to ensure data integrity during round-trip serialization.

Co-authored-by: Codex <noreply@openai.com>

ricsave/__init__.py

@@ -0,0 +1,43 @@
+"""ricsave — czytanie i edycja zapisów gry „Reksio i Czarodzieje" (silnik PIK, 2004).
+
+    >>> from ricsave import Game
+    >>> g = Game("~/Reksio/Reksio i Czarodzieje")
+    >>> s = g.slot(0)          # 0 = żywy stan rozgrywki
+    >>> s.summary()["location"]
+    'GULDRYK'
+
+Rdzeń nie ma zależności zewnętrznych. Opis formatu: docs/format-zapisow.md
+"""
+
+from . import arr, catalog, dta, schema
+from .slot import (
+    Game,
+    ItemsView,
+    SaveError,
+    SceneView,
+    Slot,
+    backup,
+    copy_slot,
+    load_game,
+    new_game,
+    save_game,
+)
+
+__all__ = [
+    "Game",
+    "ItemsView",
+    "SaveError",
+    "SceneView",
+    "Slot",
+    "arr",
+    "backup",
+    "catalog",
+    "copy_slot",
+    "dta",
+    "load_game",
+    "new_game",
+    "save_game",
+    "schema",
+]
+
+__version__ = "0.1.0"