feat(image): add terminal support check via snacks

[rachartier]

Hello,

Ghostty and Wezterm also supports displaying images with Snacks.image and with Kitty's kitten icat.

I think it is better to simply call snacks.image without even checking if the terminal is supported, as Snacks already does this: https://github.com/folke/snacks.nvim/blob/main/lua/snacks/image/buf.lua#L9 with https://github.com/folke/snacks.nvim/blob/main/lua/snacks/image/init.lua#L212.

So it is quite redundant to do this check again, as you verify exactly this with success and placement variable in your M.display_image function.

What do you think?

[dmtrKovalenko]

I wasn't able to push into your repository so I created another PR with your commit preserved #50