ADD:

ruff for code formatting

BIC statistic AND BIC test implemented

test_distributions.py for test new created dists with pytest

REFACTOR:
k_gen pdf changed from 2 params to generalized

pyproject.toml

@@ -27,3 +27,14 @@ build-backend = "uv_build"
 
 [tool.uv]
 package = false
+
+[dependency-groups]
+dev = [
+    "ruff>=0.15.9",
+]
+
+[tool.ruff]
+line-length = 120
+
+[tool.ruff.format]
+skip-magic-trailing-comma = true