Hide player join messages

[PundaChen]

Feature request

Checklist

• [x] I have read and agree to the README (found on https://github.com/Minehut/Meta)
• [x] This is not a bug report, support request or plugin request
• [x] I have searched the Issue Tracker to make sure this is not a duplicate issue
• [x] This issue does not contain any sensitive information

Platform Ingame, java and bedrock

Describe the feature Ability to turn off join messages in the lobby and perhaps ability to make it not send the message when you join the lobby

How the feature is useful Join messages tend to spam the lobby, being able to turn off your own join messages would be nice for people that don't want to be noticed (for example if a staff wants to join a lobby to view an inappropriate skin or something)

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