Option for Opt-in Hide Attachments

[Vioshim]

Plugin Description

The proposal is to create a configurable option in HideAttachments which by default makes new messages hide attachments instead of always showing them, having a rather whitelist approach than blacklist. Allowing to change Opt-out to Opt-in can make discord friendlier for work environments.

I did check for previous issues, but #163 isn't the intent of this as it's not asking for a new plugin but rather a configurable option.

Existing Plugin for other mod

No response

Request Agreement

• I read the above and made sure my plugin is possible and allowed
• I checked the existing plugins and made sure my plugin doesn't already exist
• I searched the existing issues and made sure a similar request doesn't already exist