chore: add warning (#303)

## Rationale ## Detailed Changes ## Test Plan
apache · Jan 25, 2024 · 3c6b5ab · 3c6b5ab
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+> :warning: This repository has been deprecated at 2024-01-25, further development will move to [here](https://github.com/apache/incubator-horaedb/tree/main/horaemeta).
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 # HoraeMeta
 
 [![codecov](https://codecov.io/gh/apache/incubator-horaedb-meta/branch/main/graph/badge.svg?token=VTYXEAB2WU)](https://codecov.io/gh/apache/incubator-horaedb-meta)