Feature request: wrap-path to use a meson project in any directory as wrap dependency

[ravi688]

Can we add support for another wrap type called [wrap-path]?
The contents would look like as follows:

[wrap-path]
path = toolchain/shader_compiler

[provide]
shader_compiler = shader_compiler_static_dep

Why?
I want to use a meson project already in my disk as dependency for another meson project, I've a local path to it. But I saw one must adhere to strict project directory structure - which I think may hamper scalability of medium to large sized projects.

Demonstration
I've a fork of meson to which I've added this feature.
Commit (diff): ravi688@5a8d130
The project that uses this feature can be found here