[V3 CC] CCs not pinging @here and @everyone

# Command bugs / Feature requests

Not sure if this is working as intended or a bug.

#### What cog is this command from?

CC

#### What were you expecting to happen?

If I type in `@everyone` or `@here` to a CC, I expect the respective annoyances to be pinged when executing the CC.

#### What actually happened?

CC inputs them as plaintext.

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A user was asking in #support why his CCs don't ping @here and @everyone. After some snooping around people found that `Context.send` escapes mass mentions by default, and is the reason for them not working on CCs.

In my humble opinion, there should at least be an option to use them in CCs and actually make them ping. I was thinking if you don't want them to be enabled by default, maybe an argument like {everyone} would be possible? I can see the need for admins to create CCs that use these mentions, however annoying people might feel them to be.