MODULE: try to support multiple python versions loading all toolchains

MODULE.bazel

diff --git a/MODULE.bazel b/MODULE.bazel
index 73f2d2f..aed5a9e 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -10,5 +10,17 @@
 bazel_dep(name = "rules_cc", version = "0.2.9")
 bazel_dep(name = "rules_python", version = "1.6.3")
 
+python = use_extension("@rules_python//python/extensions:python.bzl", "python")
+python.defaults(
+  # The environment variable takes precedence if set.
+  python_version = "3.12",
+  python_version_env = "BAZEL_PYTHON_VERSION",
+)
+python.toolchain(python_version = "3.10")
+python.toolchain(python_version = "3.11")
+python.toolchain(python_version = "3.12")
+python.toolchain(python_version = "3.13")
+python.toolchain(python_version = "3.14")
+
 internal_configure = use_extension("//:internal_configure.bzl", "internal_configure_extension")
 use_repo(internal_configure, "pybind11")