Export PkgConfig file for Windows.

[seanyen]

This is a feature request to enable .pc file to be exported on Windows, so downstream project can consume it.

[seanyen]

https://github.com/conda-forge/staged-recipes/pull/9968

[traversaro]

I want to work on this, but first I will ensure that the latest version of urdfdom is available.

[traversaro]

Upstream PRs:

• https://github.com/ros/console_bridge/pull/96
• https://github.com/ros/urdfdom_headers/pull/72
• https://github.com/ros/urdfdom/pull/169

conda-forge PRs:

• https://github.com/conda-forge/console_bridge-feedstock/pull/11
• https://github.com/conda-forge/urdfdom_headers-feedstock/pull/11
• https://github.com/conda-forge/urdfdom-feedstock/pull/26