fix: expose public attrb/ruleb bzl targets

docs/BUILD.bazel

@@ -100,8 +100,10 @@ sphinx_stardocs(
         "//python:py_test_bzl",
         "//python:repositories_bzl",
         "//python/api:api_bzl",
+        "//python/api:attr_builders_bzl",
         "//python/api:executables_bzl",
         "//python/api:libraries_bzl",
+        "//python/api:rule_builders_bzl",
         "//python/cc:py_cc_toolchain_bzl",
         "//python/cc:py_cc_toolchain_info_bzl",
         "//python/entry_points:py_console_script_binary_bzl",

python/api/BUILD.bazel

@@ -25,6 +25,12 @@ bzl_library(
     deps = ["//python/private/api:api_bzl"],
 )
 
+bzl_library(
+    name = "attr_builders_bzl",
+    srcs = ["attr_builders.bzl"],
+    deps = ["//python/private:attr_builders_bzl"],
+)
+
 bzl_library(
     name = "executables_bzl",
     srcs = ["executables.bzl"],
@@ -45,6 +51,12 @@ bzl_library(
     ],
 )
 
+bzl_library(
+    name = "rule_builders_bzl",
+    srcs = ["rule_builders.bzl"],
+    deps = ["//python/private:rule_builders_bzl"],
+)
+
 filegroup(
     name = "distribution",
     srcs = glob(["**"]),

python/api/attr_builders.bzl

@@ -0,0 +1,5 @@
+"""Public, attribute building APIs for Python rules."""
+
+load("//python/private:attr_builders.bzl", _attrb = "attrb")
+
+attrb = _attrb

python/api/rule_builders.bzl

@@ -0,0 +1,5 @@
+"""Public, rule building APIs for Python rules."""
+
+load("//python/private:rule_builders.bzl", _ruleb = "ruleb")
+
+ruleb = _ruleb