Deny permissions if command is issued by a webhook

[mikroskeem]

And here is the fix.

[aikar]

Copying from discord:

this seems like the wrong solution
we need to make permissions support multiple annotations, for OR conditions
and webhooks should have its own permission node
so that you can say @CommandPermission({"webhook", "foo"));
OR
we need a WebhookPermissionResoler
so that you can do stuff like "I know I'm a bridge, figure out permisssible context from the message"

[mikroskeem]

I find this PR still valid to get rid of bridge users malicously cluttering bot logs with NPE stacktraces.

However I agree that this could have a better solution at some point.

Commands worked fine for bridge users without @CommandPermission annotation for now though (which means command wouldn't pass PermissionResolver)

[aikar]

ok im fine with merging it then, but we def need to approach this more.
I'll open an issue with my thoughts