[Documentation] PushCase README standardization edits

[kdmukai]

Description

The other enclosures included in our repo are just matter-of-fact presentations of their design.

My edits strip out the designer's personal references to external social media links, donation addr, and store url.

A later TODO: fully standardize ALL enclosure READMEs in the repo via a formal template (see #592).

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This pull request is categorized as a:

• [x] Documentation

[jdlcdl]

ACK

Nice catch, I agree and note:

• Now I can follow another fellow dev on github ;)
• And can find their X.com account from there,
• And can get to their online store from there.

So no linkability was lost, just indirected in a clear-to-find way. This is much more appropriate for a foss project.

[newtonick]

Agree with the changes suggested and support moving enclosures eventually to a dedicated repo in the future.