Extend remaining slack rtm api events

[ArcticZeroo]

Extend all remaining api events that were not extended in the first push:

• [ ] bot_added
• [ ] bot_changed
• [ ] channel_history_changed
• [ ] channel_marked
• [ ] emoji_changed
• [ ] file_change
• [ ] file_comment_added
• [ ] file_comment_deleted
• [ ] file_comment_edited
• [ ] file_created
• [ ] file_deleted
• [ ] file_public
• [ ] file_shared
• [ ] file_unshared
• [ ] im_history_changed
• [ ] im_marked
• [ ] star_added
• [ ] star_removed
• [ ] subteam_created
• [ ] subteam_members_changed
• [ ] subteam_self_added
• [ ] subteam_self_removed
• [ ] subteam_updated
• [ ] pin_added
• [ ] pin_removed
• [ ] pref_change
• [ ] presence_change
• [ ] presence_query
• [ ] presence_sub
• [ ] team_plan_change
• [ ] team_pref_change
• [ ] team_profile_change
• [ ] team_profile_delete
• [ ] team_profile_reorder
• [ ] email_domain_changed
• [ ] group_close
• [ ] group_history_changed
• [ ] im_close

[ArcticZeroo]

Also add support for pinging!

reply_to: 16428
type: "pong"