Update README.md

Author: Shulyaka

README.md

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-Home Assistant custom component for Anthropic Claude conversation agent
+# Important note: This integration has been accepted into core. This repository will be archived when it is released.
+
+## Home Assistant custom component for Anthropic Claude conversation agent
 
 Legal notice: This integration uses the official API. Please note that Anthropic API is intended for B2B and not for individual use, [more info here](https://support.anthropic.com/en/articles/8987200-can-i-use-the-claude-api-for-individual-use). Therefore this integration is intended for commercial uses.