[Chat Community] Update README.md (fixed#3487)

[NatalieC323]

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📝 What does this PR do?

The README file for ColossalChat community is updated and open for future possible features proposed by community.

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• My issue clearly describes the problem/feature/proposal, with diagrams/charts/table/code if possible
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• I have added thorough tests.
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[Fazziekey]

@yynil your work have been remove here

[yynil]

Got it! I'm planing to add some patches to these codes.