add black to the ci

noxfile.py

@@ -1,5 +1,6 @@
 """Nox sessions."""
 import os
+import shutil
 from pathlib import Path
 
 import nox
@@ -9,9 +10,12 @@
 
 package = "core"
 python_versions = ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+locked_python_version = "3.8"
 nox.needs_version = ">= 2022.11.21"
 nox.options.sessions = (
+    "docs",
     "tests",
+    "lint",
 )
 
 
@@ -21,6 +25,28 @@
 ]
 
 
+
+@session(python=locked_python_version)
+def docs(session: Session) -> None:
+    """Build the documentation."""
+    args = session.posargs or ["docs", "docs/_build"]
+    if not session.posargs and "FORCE_COLOR" in os.environ:
+        args.insert(0, "--color")
+
+    build_dir = Path("docs", "_build")
+    if build_dir.exists():
+        shutil.rmtree(build_dir)
+
+    session.run("sphinx-build", *args)
+
+
+@session(python=locked_python_version)
+def lint(session: Session) -> None:
+    """Lint our code."""
+    session.install("black")
+    session.run("black", "--verbose", "--check", ".")
+
+
 def install_handle_python(session):
     """
     handle incompatibilities between python and other packages