COMP: Build examples in CI; drop spurious itk_module_examples() from IOMeshMZ3

[hjmjohnson]

Enable BUILD_EXAMPLES in the configure-ci pixi task and fix the one module that broke under it: IOMeshMZ3 called itk_module_examples() (which does add_subdirectory(examples)) but ships no examples/ directory, failing the configure.

Details

• IOMeshMZ3/CMakeLists.txt — dropped the spurious itk_module_examples() call (the module has no examples/ dir). Mirrors the existing convention in AnisotropicDiffusionLBR, which already omits the call.
• pyproject.toml — added -DBUILD_EXAMPLES:BOOL=ON to configure-ci, so this class of breakage (a module calling itk_module_examples() without an examples/ dir) is caught at configure time in CI instead of only when a developer enables examples locally.
• AnisotropicDiffusionLBR/CMakeLists.txt — removed a stale explanatory comment.

Validated locally: configure-ci with BUILD_EXAMPLES=ON configures cleanly, full build (incl. examples) succeeds, pre-commit run --all-files green.

[greptile-apps]

Greptile Summary

This PR turns on example builds in CI and fixes the module that failed under that setting.

• Enables BUILD_EXAMPLES in the configure-ci CMake command.
• Removes itk_module_examples() from IOMeshMZ3, which has no examples/ directory.
• Removes a stale explanatory comment from AnisotropicDiffusionLBR.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
Modules/IO/IOMeshMZ3/CMakeLists.txt	Removes the examples subdirectory hook from a module that does not ship an examples/ directory.
pyproject.toml	Adds BUILD_EXAMPLES=ON to the CI configure task so example configuration and build issues are covered.
Modules/Filtering/AnisotropicDiffusionLBR/CMakeLists.txt	Removes only a comment about the already-omitted examples hook.

_{Reviews (1): Last reviewed commit: "COMP: Drop itk_module_examples() from IO..." | Re-trigger Greptile}