Add installer for Processwire module

[daun]

Install CamelCased dependencies into site/modules/.

For easier review, this is what the official docs about ProcessWire modules have to say:

Site modules (stored in /site/modules/) are those that you obtain separately and install yourself.

Installing a site module is as simple as uploading the module's files to the /site/modules/ModuleName/ directory on your server (where ModuleName is the name of the module).

[daun]

What's the best way to get this reviewed and merged? @naderman @Seldaek

Sorry for spamming you directly, just not sure about the review process for new installers. I added relevant documentation in the PR comment to help along the process, but let me know if it's missing any crucial information.

[daun]

Thanks 🌝 Any chance to get a new tagged release @niksamokhvalov?

[niksamokhvalov]

Yes! In the next few days.