Update rootbuilder.md

Update openmwplayer.md

Merge branch 'main' of https://github.com/Kezyma/ModOrganizer-Plugins

OpenMW Player 2.1.3a

Update rootbuilder.md

Updated releases.

Bumped openmwplayer and rootbuilder.

new build and debug scripts.

Added content validators for RB and OMWP

Update openmwplayer_checker.py

Update openmwplayer.meta

Update openmwplayer_checker.py

Updated meta files.

Update openmwplayer.json

Bumped rootbuilder to 5.1.0