Convert mods/datums/ from tracked files to a git submodule pointing
to https://git.kindred-systems.com/kindred/datums.git (branch: main).
Follows the same submodule pattern as silo, solver, and gears.
The datums remote repo was initialized from the existing tracked files
with the package.xml repository URL updated to point to the new repo.
CMake install targets in src/Mod/Create/CMakeLists.txt continue to
work unchanged since the files remain at the same paths.
- Remove ZTools install block from src/Mod/Create/CMakeLists.txt
- Remove mods/ztools submodule entry from .gitmodules
- Remove 'ztools' from legacy fallback order in addon_loader.py
- Remove ztools imports and test classes from test_kindred_pure.py
(TestTypeMatches, TestMatchScore, TestSelectionItemProperties,
TestColumnToIndex, TestDatumModes)
- Remove 'ztools Workbench' from issue template component lists
- Remove mods/ztools submodule from git tracking
ZTools will be archived to a reference folder in a separate step (#345).
This is part of the UI/UX rework epic (#346).
- Remove QuickNav install block from src/Mod/Create/CMakeLists.txt
- Remove mods/quicknav submodule entry from .gitmodules
- Remove quicknav imports and TestWorkbenchMap tests from test_kindred_pure.py
- Remove mods/quicknav submodule from git tracking
QuickNav will be archived to a reference folder in a separate step (#345).
This is part of the UI/UX rework epic (#346).
Add branch = main to mods/silo and mods/ztools in .gitmodules.
Enables 'git submodule update --remote' to auto-advance to latest main.
Third-party deps (GSL, googletest, AddonManager) remain pinned.
Syncing and update submodule should work, but if it doesn't then the following will reset it (+ remove all local changes):
```sh
git submodule deinit -f src/3rdParty/OndselSolver
git submodule update --init --recursive src/3rdParty/OndselSolver
```
