Add 'make venv' target (#6775)

Fixes #6775

python-dev-requirements.txt

@@ -0,0 +1,33 @@
+# Copyright 2003-2025 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
+
+# These packages are only required for developers who want to run the whole
+# test suite, or other development steps like code formatting or linting.
+# They are NOT required for building, running or packaging Verilator itself.
+
+# The usual use of this file is via the `make venv` target, as described in
+# docs/guide/install.rst
+
+# We use specific version numbers, otherwise a Python package update may add a
+# warning and break our builds
+
+# Keep sorted
+
+breathe==4.36.0
+compiledb==0.10.7
+distro==1.9.0
+gersemi==0.23.1
+mbake==1.4.3
+mypy==1.19.0
+pylint==3.0.2
+ruff==0.14.8
+sarif-tools==3.0.5
+sphinx_rtd_theme==3.0.2
+sphinx==8.1.3
+sphinxcontrib-spelling==8.0.2
+yapf==0.43.0
+
+git+https://github.com/antmicro/astsee.git