Add Satoshi symbol concepts to the "Visual language" page

[GBKS]

There are various concepts for Satoshi symbols that should also be featured on the page for the visual language of Bitcoin. I tried to gather the concepts here in Figma.

[Bosch-0]

Relevant to #245

[Bosch-0]

Sat concept: https://github.com/bitficus/theSat

[pavlenex]

@GBKS Is this related to #61 a bit more? If so we can close it in favour of that one and add additional context there.

[GBKS]

It's a different thing, more about the creative explorations the Bitcoin community is doing. I just need to get this done, it won't take a long time and I have already gathered the visuals for it.

[pavlenex]

Ah I see, you want those random "sats symbol" attempts. In that case yeah, visual lang makes more sense.

[GBKS]

This is completed with #475.