Add OCR Numbers Test Generator

[jpreese]

This issue is part of an overall initiative to complete #195.

The documentation on how to add generators can be found here. If you get stuck or have any questions about adding this generator, please do not hesitate to reach out!

[GKotfis]

I'll deal with it

[GKotfis]

I need to figure it out how to generate valid digit representation as code:

Don't know if DotLiquid have such option to generate non string characters that are part of code - here '+' sign

[GKotfis]

Have something that generate almost desired output:

as you see I lost indentation - argument not starting in the same line as method call. But maybe it's ok?

[ErikSchierboom]

@GKotfis Hmmm, that's almost correct! There is an Indent function somewhere, but I don't know if you can easily use that in your code. If not, I think this is fine.

[ErikSchierboom]

Closed by #450