Pathfind: MS Visual Studio support

Acceptance criterion

The user can fetch the sources using Visual Studio, or import existing source tree on the disk and naturally build project. Also there should be some build target that allows to attach debugger to PHP interpreter with the extension loaded, and step through the code, or add more diagnostics.

Motivation

To resolve future build issues, or Windows-specific bugs, we need good integration with native tools that come with Visual Studio.

Nice to have

These might be done as a part of this ticket, or extracted later into separate ones.

A guides on some some useful tasks like:

• inspect binary dependencies
• run build and runtime profilers
• track memory leaks and measure resource consumption