Notice of PipelineWise being shrank (#237)

* PipelineWise shrink Notice

* Create CODEOWNERS

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Co-authored-by: Luke Tang <[email protected]>

Author: louis-pie

.github/CODEOWNERS

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+* @transferwise/analytics-platform

README.md

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+# Notice
+To better serve Wise business and customer needs, the PipelineWise codebase needs to shrink.
+We have made the difficult decision that, going forward many components of PipelineWise will be removed or incorporated in the main repo.
+The last version before this decision is [v0.64.1](https://github.com/transferwise/pipelinewise/tree/v0.64.1)
+
+We thank all in the open-source community, that over the past 6 years, have helped to make PipelineWise a robust product for heterogeneous replication of many many Terabytes, daily
+
 # pipelinewise-tap-postgres
 
 [![PyPI version](https://badge.fury.io/py/pipelinewise-tap-postgres.svg)](https://badge.fury.io/py/pipelinewise-tap-postgres)