v1.21.2

Changes:
Major Updates to Navmeshes (#605) (Navs#6)
Cherry pick "remove unnecessary namespaces" from primedev (Launcher#618)
Folder restructuring from primedev (Launcher#624)

Fixes:
Make RequiredOnClient text clearer (Mods#720)
Add missing server browser localisation for WRONG_MOD_VERSION (Mods#710)

Development related changes:
Set a better AccessModifierOffset in clang-format (Launcher#619)
Add Action to add label to PR on merge conflict (Launcher#621, Mods#772)

Contributors:
@ASpoonPlaysGames @F1F7Y @GeckoEidechse @Zanieon