Scaffold gausse coilgun simulator project

src-layout Python package with CLI stub (sweep/evolve/simulate/report
subcommands), pyproject.toml pinned to numpy/scipy/matplotlib, and PLAN.md
tracking the implementation roadmap.

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

pyproject.toml

@@ -0,0 +1,29 @@
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "gausse"
+version = "0.1.0"
+description = "Симулятор и оптимизатор многоступенчатого электромагнитного ускорителя (coilgun)"
+requires-python = ">=3.11"
+dependencies = [
+    "numpy>=1.26",
+    "scipy>=1.11",
+    "matplotlib>=3.8",
+]
+
+[project.optional-dependencies]
+dev = ["pytest>=8.0"]
+
+[project.scripts]
+gausse = "gausse.cli:main"
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.setuptools.package-data]
+gausse = ["components/data/*.json"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]