Replace external repositories with submodules

This repository requires the use of WRF, WPS, MeteoIO and SNOWPACK. This PR replaces the code inside the repository to forks of the projects or the projects themselves.

The repositories located on the Weather Research and Forecasting Model Github have been replaced with CRYOWRF-WRF and CRYOWRF-WPS repositories locally on the WSL gitlab to manage changes required for CRYOWRF to function.

Furthermore, a CI pipeline and a Dockerfile have been added to aid in testing the build of CRYOWRF.