The library jumped to Zig v0.15.2 which implies a new build system.
`build.zig` now compiles libipc as both static and dynamic libraries,
and provides an entry point to use `libipc` as-is for Zig applications.
Some examples have been added to help new users play with the library.
Thanks to these fairly complete examples, two (very small) leaks related
to sentinel values (in arrays containing paths) were fixed.
