Add meson build files

[awvwgk]

• allow building minpack with meson
  • enable building of shared library
  • install module files and header files
  • generate pkg-config file
  • allow direct integration with SciPy build system (see Goal: Get this minpack used by SciPy #14)
• use micromamba to install dependencies
  • toolchain files for fpm, meson and docs workflow