Adds code coverage and GitHub Actions badges (opensearch-project#1498)

Resolves opensearch-project#1035

Signed-off-by: Tommy Markley <[email protected]>

README.md

@@ -12,6 +12,13 @@ OpenSearch Dashboards is an open source search and analytics visualization. We a
 
 Feel free to take a look at what the community has been up to, and then head over to the [Project Board](https://github.com/opensearch-project/OpenSearch-Dashboards/projects) to track release targets, or jump in and [start opening issues](https://github.com/opensearch-project/OpenSearch-Dashboards/issues/new/choose), [set up your development environment](DEVELOPER_GUIDE.md#getting-started), or [start contributing](CONTRIBUTING.md).
 
+## Code Summary
+
+[![Build and Test][build-and-test-badge]][build-and-test-link]
+[![Unit Test Code Coverage][codecov-badge]][codecov-link]
+[![Developer Certificate of Origin Check][dco-badge]][dco-link]
+[![Link Checker][link-checker-badge]][link-checker-link]
+
 ## Project Resources
 
 * [Project Website](https://opensearch.org/)
@@ -37,3 +44,12 @@ This project is licensed under the [Apache v2.0 License](LICENSE.txt).
 ## Copyright
 
 Copyright OpenSearch Contributors. See [NOTICE](NOTICE.txt) for details.
+
+[build-and-test-badge]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/build_and_test_workflow.yml/badge.svg
+[build-and-test-link]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/build_and_test_workflow.yml
+[codecov-badge]: https://codecov.io/gh/opensearch-project/OpenSearch-Dashboards/branch/main/graphs/badge.svg
+[codecov-link]: https://app.codecov.io/gh/opensearch-project/OpenSearch-Dashboards
+[dco-badge]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/dco.yml/badge.svg
+[dco-link]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/dco.yml
+[link-checker-badge]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/links_checker.yml/badge.svg
+[link-checker-link]: https://github.com/opensearch-project/OpenSearch-Dashboards/actions/workflows/links_checker.yml