docs: document tickets plugin (#46)

Signed-off-by: Luca Zeuch <[email protected]>

Author: l-zeuch

content/docs/tools-and-utilities/tickets-overview.png

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+title = 'Tickets'
+weight = 730
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+
+<!--more-->
+
+Tickets let your members interact with your server staff in a private and more organized way. The bot will create a
+dedicated channel that can only be seen by the staff and the member who created the ticket, with the option to add more
+users as-needed.
+
+{{< callout context="note" title="Note" icon="outline/info-circle" >}}
+
+Make sure that the bot has permission to manage channels in the category you want the bot to create tickets in, as well
+as permission to send messages in said category, the transcript channels, and the ticket log channel.
+
+{{< /callout >}}
+
+![Tickets configuration interface](tickets-overview.png)
+
+## Commands
+
+See the [Commands](/docs/core/all-commands/#tickets-) page for a listing of all commands. By default, we impose no
+restrictions on who can run these commands, though it may be pertinent to restrict sensitive commands such as the
+`-tickets close` command to staff members using [Command overrides](/docs/core/command-settings).
+
+## Configuration
+
+At the top of the tickets settings page, you will find a toggle to enable or disable the ticket system in its entirety.
+If you wish to disable certain parts, such as the `tickets adduser` command, please use a command override instead.
+
+If you disable the ticket system, the bot will respond with an error message when you try to run ticket-related
+commands, unless they are also disabled using command overrides.
+
+### Admin Roles
+
+Individual tickets can be set to an admin-only mode, where only users with these specified roles will be able to view
+that ticket channel.
+
+Toggling this mode is done by running `-tickets adminonly` in the ticket's channel. Running the command again will
+deactivate the admin-only mode. This may serve useful when handling issues that require a higher level of privacy,
+such as complaints about staff members.
+
+Select as many roles as you like---they need not have "Administrator" or similar Discord permissions commonly associated
+with the term "admin".
+
+### Mod Roles
+
+These roles will be excluded from viewing tickets that are set to admin-only mode. Select as many as you like---they
+need not have "Manage Messages", "Moderate Members" or other Discord permissions commonly associated with the term
+"moderator".
+
+Having selected separate roles for moderators and administrators can be useful in larger servers where the two roles
+have different responsibilities, but nothing prevents you from selecting the same role for both.
+
+### Ticket Category
+
+The bot uses channels for tickets, and these channels are created in a category of your choosing. This category should
+be set up with the necessary permissions for the bot to create channels in it.
+
+{{< callout context="note" title="Note" icon="outline/info-circle" >}}
+
+Discord limits categories to contain at most 50 channels. If you experience a high volume of tickets, consider closing
+some or researching alternative bots that handle tickets differently.
+
+{{< /callout >}}
+
+### Ticket Transcripts Channel
+
+This is the channel where text transcripts of tickets will be sent to, given that you activated the option to do so.
+This channel does not have to be part of the ticket category you selected further up.
+
+We also provide a separate option to download attachments sent in the ticket, which will be posted as a ZIP archive in
+this channel.
+
+To keep admin-only tickets private, you can select a separate transcripts channel for tickets that were closed when they
+are in the admin-only mode during closure---if this is not necessary for your server, select the same channel as for the
+regular tickets.
+
+### Ticket Status Updates
+
+When a ticket is created or closed, the bot will send a message to this channel to inform your staff about this event.
+Selecting "None" will cause the bot to not send these updates.
+
+### Opening Message
+
+This field supports [custom command templating](/docs/reference/templates/syntax-and-data) and will be executed in the
+newly created channel whenever a new ticket is created. Feel free to customize this as you see fit.
+
+The default message is the following custom command code:
+
+```yag
+{{$embed := cembed `description` (joinStr `` `Welcome ` .User.Mention `
+
+Please describe the reasoning for opening this ticket, include any information you think may be relevant such as proof, other third parties and so on.`
+"\n\nuse the following command to close the ticket\n"
+"`-ticket close reason for closing here`\n\n"
+"use the following command to add users to the ticket\n"
+"`-ticket adduser @user`")}}
+{{sendMessage nil $embed}}
+```
+
+The user-provided reason for opening this ticket is available under the `{{ .Reason }}` template data.