Add Inno Setup formatting section to README

[datadiode]

Added a section on formatting Inno Setup [Code] sections with an example script.

[jgardn3r]

Hi @datadiode,

Thank you for your interest in our project.

Pascal Script isn't an officially supported use case of pasfmt, especially as an embedded snippet in Inno Setup files. As such, we don't think it is appropriate to advertise it in the README.md.

Thanks