Add README

Signed-off-by: Kevin Mittman <kmittman@nvidia.com>

README.md

+# build-system-archive-import-examples
+
+[![License](https://img.shields.io/badge/license-MIT-green.svg)](https://opensource.org/licenses/MIT-license)
+[![Contributing](https://img.shields.io/badge/Contributing-Developer%20Certificate%20of%20Origin-violet)](https://developercertificate.org)
+
+
+## Overview
+
+Examples for importing precompiled binary `tarball` and `zip` archives into various CI/CD build and packaging systems
+
+
+## Redistrib JSON
+
+Sample script for parsing `redistrib_${label}.json` manifests ([JSON schema](https://developer.download.nvidia.com/compute/redist/redistrib-v2.schema.json)).
+
+  - Downloads each archive
+  - Validates SHA256 checksums
+  - Extracts archives
+  - Flattens into a collapsed directory structure
+
+### Usage
+
+```shell
+usage: parse_redist.py (-u URL | [-l LABEL] [-p PRODUCT]) [-o OUTPUT]
+       option filters: [--component COMPONENT] ([--os OS] [--arch ARCH])
+       option toggles: [--no-download] [--no-checksum] [--no-extract] [--no-flatten]
+```
+
+### Example
+
+```shell
+python3 ./parse_redist.py --product cuda --label 11.4.2
+```
+
+or equivalent
+
+```shell
+python3 ./parse_redist.py --url https://developer.download.nvidia.com/compute/cuda/redist/redistrib_11.4.2.json
+```
+
+
+## CMake
+
+### FindCUDAToolkit
+
+See example [cmake/1_FindCUDAToolkit/](cmake/1_FindCUDAToolkit/)
+
+### ExternalProject
+
+See example [cmake/2_ExternalProject/](cmake/2_ExternalProject/)
+
+## Bazel
+
+### pkg_tar
+
+See example [bazel/1_pkg_tar/](bazel/1_pkg_tar/)
+
+## Contributing
+
+See [CONTRIBUTING.md](CONTRIBUTING.md)