Add README template

Author: vmwghbot

README.md

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+
+# terraform-provider-tanzu-mission-control
+
+## Overview
+
+## Try it out
+
+### Prerequisites
+
+* Prereq 1
+* Prereq 2
+* Prereq 3
+
+### Build & Run
+
+1. Step 1
+2. Step 2
+3. Step 3
+
+## Documentation
+
+## Contributing
+
+The terraform-provider-tanzu-mission-control project team welcomes contributions from the community. Before you start working with terraform-provider-tanzu-mission-control, please
+read our [Developer Certificate of Origin](https://cla.vmware.com/dco). All contributions to this repository must be
+signed as described on that page. Your signature certifies that you wrote the patch or have the right to pass it on
+as an open-source patch. For more detailed information, refer to [CONTRIBUTING.md](CONTRIBUTING.md).
+
+## License