Add root-level pyproject.toml with dependencies

Lucas Chess can now be run via `uv run bin/LucasR.py`.

Python dependencies are installed automatically, venv activation is handled by uv.

Author: bittner

.python-version

@@ -0,0 +1 @@
+3.8

pyproject.toml

@@ -0,0 +1,25 @@
+[project]
+name = "lucas-chess"
+version = "2.20.0.dev0"
+description = "Lucas Chess is an easy way to play and train chess on your PC"
+readme = "README.md"
+requires-python = ">=3.7"
+dependencies = [
+    "chardet>=5.2.0",
+    "chess>=1.10.0",
+    "pillow>=9.5.0",
+    "polib>=1.2.0",
+    "psutil>=7.0.0",
+    "pyside2>=5.15.2.1",
+    "requests>=2.31.0",
+    "sortedcontainers>=2.4.0",
+]
+
+[dependency-groups]
+build = [
+    "cython>=3.0.12",
+    "deep-translator>=1.11.4",
+]
+dev = [
+    "ruff>=0.12.12",
+]