doc: Add Twitter automation label requirement to quickstart guide

[julienbrs]

Issue

Multiple users have reported their Eliza agents being flagged or shadowbanned on Twitter when their accounts weren't properly labeled as automated.

Current Situation

The quickstart guide explains how to set up Twitter integration but doesn't mention the requirement to enable the "Automated" label in the Twitter Developer Portal.

Proposed Solution

Add a brief but important notice in the Twitter Integration section of the quickstart guide about enabling the "Automated" label to prevent accounts from being flagged.

References

• Discord discussions about accounts being flagged

[madjin]

i see it got merged, ty