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

uv.lock

@@ -100,6 +100,11 @@ dependencies = [
     { name = "statsmodels" },
 ]
 
+[package.dev-dependencies]
+dev = [
+    { name = "ruff" },
+]
+
 [package.metadata]
 requires-dist = [
     { name = "ipykernel" },
@@ -117,6 +122,9 @@ requires-dist = [
     { name = "statsmodels" },
 ]
 
+[package.metadata.requires-dev]
+dev = [{ name = "ruff", specifier = ">=0.15.9" }]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"