Don't use Tempfiles for diffing

[marcoroth]

Difftastic Supports diffing using Strings as arguments, instead of passing a path to the file.

bash-3.2$ difft <(echo "\"123\"") <(echo "\"456\"")
/dev/fd/63 --- Text
1 "123"                       1 "456"

It would be great if we wouldn't have to create Tempfiles for diffing.

We might need a --ext-type=ruby or similar for the difft executable to be able to get the diff passed through the Ruby Tree Sitter parser.

[marcoroth]

I tried to implement a version of this for the Difftastic::Differ but I couldn't get more complex hashes/object to be probably escaped into a string that both difft and bash liked 😅