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>

pyproject.toml

@@ -0,0 +1,22 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "ricsave"
+version = "0.1.0"
+description = "Edytor zapisów gry Reksio i Czarodzieje (silnik PIK, 2004)"
+requires-python = ">=3.11"
+dependencies = []
+
+[project.optional-dependencies]
+dev = ["pytest>=8"]
+
+[project.scripts]
+ricsave = "ricsave.cli:main"
+
+[tool.hatch.build.targets.wheel]
+packages = ["ricsave", "webapp"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]