Add README docs

Signed-off-by: Siyu Wang <[email protected]>

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+Koordinator follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).

OWNERS

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+# See: https://go.k8s.io/owners
+
+approvers:
+  - hormes
+
+reviewers:
+  - hormes
+  - FillZpp

README.md

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+# Koordinator
+
+[![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
+
+## Introduction
+
+Koordinator is a QoS based scheduling system for hybrid orchestration workloads on Kubernetes.
+It aims to improve the runtime efficiency and reliability of both latency sensitive workloads and batch jobs,
+simplify the complexity of resource-related configuration tuning, and increase pod deployment density to improve resource utilizations.
+
+Koordinator enhances the kubernetes user experiences in the workload management by providing the following:
+
+- Well-designed priority and QoS mechanism to co-locate different types of workloads in a cluster, a node.
+- Allowing for resource overcommitments to achieve high resource utilizations but still satisfying the QoS guarantees by leveraging an application profiling mechanism.
+- Fine-grained resource orchestration and isolation mechanism to improve the efficiency of latency-sensitive workloads and batch jobs.
+- Flexible job scheduling mechanism to support workloads in specific areas, e.g., big data, AI, audio and video.
+- A set of tools for monitoring, troubleshooting and operations.
+
+## Quick Start
+
+...
+
+## Contributing
+
+...
+
+## License
+
+Koordinator is licensed under the Apache License, Version 2.0. See [LICENSE](./LICENSE.md) for the full license text.