Image welcome messages, new commands and what is next

Here's a new cool feature, new commands, and some informations about the bot ...

Welcome and say goodbye to users with an image
You can now greetings new users and say goodbye with an image! Use the command ,imgwelcome to start.
Thanks to aikaterna for the base of this.

Features:

- You can choose a personalised background.
- You can change the color of all the texts and also of the texts outline.
- You can also change the profile image border color.
- You can choose between 3 different fonts for all part of texts (More will come later)
- Avatar size can be changed.
- A command to see a preview of what you choosed is available for welcome and leave.
- You can know by default (can be disabled) if a new user's account is less than 7 days old, or also when a user join and it's a multiple of 100, or #1337.

The one that can send messages in embeds (or not) is still available obsiously, by using ,welcomeset command you will see how to set it.

New commands

- ,imgwelcome: Explained above, welcome and say goodbye to users with an image.

- ,hololewd: Send random hololewd images.
- ,lewd: Send random lewd images.
- ,nekogif: Send random nekos gifs.

Bot informations

Some new things are coming in the future, like always yes.
In the short term a new identity for the bot, I don't say more about that, I will make an other announcement for it. Also mobile adaptation for the website will be done. New features on Red (the bot which Martine are based on) are coming, I am waiting Red 3.2 to update this time, a lot of exciting things will come, like on audio for example, I also don't say more for now but those who use Spotify playlists on the bot will be happy. About the most popular feature of the bot (nsfw commands), moooore commands will come, more "not-real" things for those are interested.
In the long term, the project of a dashboard to control features of the bot is something I'd like to see, it will come some day. (NeuroA )

(Yeah also you with the users role because it's an important features 👀)