add Readme.md

Author: jackgopack4

e2etests/README.md

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+# End-to-End Tests (e2etests)
+
+This directory contains the end-to-end tests for the OpenTelemetry Collector Contrib repository. These tests are designed to validate the functionality and integration of various components in real-world scenarios.
+
+## Dependencies
+
+The e2etests package leverages the following external packages:
+
+- [Datadog Agent E2E Tests](https://github.com/DataDog/datadog-agent/tree/main/test/new-e2e): Provides a framework and utilities for running end-to-end tests.
+- [Datadog Test Infra Definitions](https://github.com/DataDog/test-infra-definitions): Supplies infrastructure definitions and configurations for setting up test environments.
+
+## Usage
+
+To run the tests, ensure that all dependencies are installed and configured correctly. Refer to the documentation in the linked repositories for setup instructions.
+
+## Contributing
+
+Contributions to the e2etests package are welcome. Please ensure that any changes are thoroughly tested and documented.
+
+## License
+
+This project is licensed under the Apache 2.0 License. See the [LICENSE](../LICENSE) file for details.