feat: add avatar visibility option

[BerniWittmann]

Gives users the option to hide or show the avatar

[antonreshetov]

I think I already answered that question #16

[BerniWittmann]

@antonreshetov #16 was a new template and you answered, that you want to implement it as an option for all templates. This is also stated in the Github Project Card.

So i came up with this PR, which adds an option to hide the avatar and is not a new template

[antonreshetov]

@BerniWittmann
I mean, I'm going to implement it. What I actually doing, I have locally there is a branch and the rough work on this.

Well, not to lose your work. Let's make some adjustments

Avatar is enabled by default. Accordingly, the Avatar Visibility option must have the switch already enabled.

Rename Avatar Visibility => Avatar and remove labels from the switch

[BerniWittmann]

Whatever 😃 just feel free to do what you want with it (including dropping these changes)

[antonreshetov]

Need to be sensitive to someone else's work, so I just adjusted yours. :)

[antonreshetov]

@BerniWittmann please adjust the PR so I can merge it