Added `cargo_bootstrap_repository` rule (#891)

* Added `cargo_bootstrap_repository` rule.

* Regenerate documentation
diff --git a/cargo/defs.bzl b/cargo/defs.bzl
new file mode 100644
index 0000000..ed5e31b
--- /dev/null
+++ b/cargo/defs.bzl
@@ -0,0 +1,7 @@
+"""Common definitions for the `@rules_rust//cargo` package"""
+
+load(":cargo_bootstrap.bzl", _cargo_bootstrap_repository = "cargo_bootstrap_repository")
+load(":cargo_build_script.bzl", _cargo_build_script = "cargo_build_script")
+
+cargo_bootstrap_repository = _cargo_bootstrap_repository
+cargo_build_script = _cargo_build_script