Add a script for testing LiteScope

[jedrzejboczar]

Allows to list available signal names and to pass them from command line. Does some simple substring matching (with regex support).

[cklarhorst]

Hi @jedrzejboczar
nice script, I like your idea to specify signals via regex.
Couldn't we put your script to litescope/litescope/tools/.
To upgrade this script from "another example" to "the main fetch script for litexscope data"?
And to have the same structure for scripts as the litex git?

[jedrzejboczar]

I can move it there, sure. But that's probably more of a question to @enjoy-digital
If so we could probably add additional arguments for dump file name, analyzer name, etc.

[cklarhorst]

Yes, lets see what he says about it. I think it would also be helpful for the new debug targets in the buildenv git (timvideos/litex-buildenv#492).

[enjoy-digital]

Hi @cklarhorst,

indeed, that's exactly the idea i had when @jedrzejboczar shared with me the nice script he did and i asked him if he could do do a PR for it. I need to uddate the LiteScope examples and will move the location of this script to make sure it's available externally.

For now the script has been merged.