Complete redesign of Subsurface version numbers

- for now all versions start with v6.0
- CICD builds use the monolithic build number as patch level, e.g. v6.0.12345
- local builds use the following algorithm
  - find the newest commit with a CICD build number that is included in the
    working tree
  - count the number of commits in the working tree since that commit
  - if there are no commits since the last CICD build, the local build version
    will be v6.0.12345-local
  - if there are N commits since the last CICD build, it will be
    v6.0.12345-N-local
- test builds in the CICD that don't create artifacts simply use a dummy release
  in order to not incorrectly increment the build number and also not to waste
  time and resources by manually checking out the nightly-build repo for each of
  these builds.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/windows/create-win-installer.sh

@@ -7,7 +7,7 @@ cd /__w
 
 # grab the version number
 cd subsurface
-VERSION=$(./scripts/get-version linux)
+VERSION=$(./scripts/get-version)
 cd ..
 
 # prep the container