refactor: split out the python_repository rule to a separate file

Author: aignas

examples/bzlmod/MODULE.bazel.lock

@@ -231,6 +231,7 @@ bzl_library(
     deps = [
         "//python/private:py_repositories_bzl",
         "//python/private:python_repositories_bzl",
+        "//python/private:python_repository_bzl",
     ],
 )
 

python/BUILD.bazel

@@ -146,25 +146,37 @@ bzl_library(
     name = "py_repositories_bzl",
     srcs = ["py_repositories.bzl"],
     deps = [
-        "//python/private:bazel_tools_bzl",
-        "//python/private:internal_config_repo_bzl",
+        ":bazel_tools_bzl",
+        ":internal_config_repo_bzl",
         "//python/private/pypi:deps_bzl",
     ],
 )
 
+bzl_library(
+    name = "python_repository_bzl",
+    srcs = ["python_repository.bzl"],
+    deps = [
+        ":auth_bzl",
+        ":repo_utils_bzl",
+        ":text_util_bzl",
+        "//python:versions_bzl",
+    ],
+)
+
 bzl_library(
     name = "python_repositories_bzl",
     srcs = ["python_repositories.bzl"],
     deps = [
+        ":auth_bzl",
+        ":bazel_tools_bzl",
+        ":bzlmod_enabled_bzl",
+        ":coverage_deps_bzl",
+        ":full_version_bzl",
+        ":internal_config_repo_bzl",
+        ":python_repository_bzl",
+        ":repo_utils_bzl",
+        ":toolchains_repo_bzl",
         "//python:versions_bzl",
-        "//python/private:auth_bzl",
-        "//python/private:bazel_tools_bzl",
-        "//python/private:bzlmod_enabled_bzl",
-        "//python/private:coverage_deps_bzl",
-        "//python/private:full_version_bzl",
-        "//python/private:internal_config_repo_bzl",
-        "//python/private:repo_utils_bzl",
-        "//python/private:toolchains_repo_bzl",
         "//python/private/pypi:deps_bzl",
     ],
 )