Provide feature that makes visible the vendor settings of a CMake preset

### Brief Issue Summary

When defining CMake Presets with multiple levels of inheritance it would be useful to be able to verify that the net vendor settings of a preset are correct. With CMake settings this can be done by inspecting the cache (cmake -LA) but I think there is no way of verifying vendor settings. Please consider adding a feature to cmake-tools to facilitate this.

### CMake Tools Diagnostics

_No response_

### Debug Log

_No response_

### Additional Information

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Start by reviewing how cmake-tools reads and presents CMake Presets, with particular attention to inherited vendor settings; the issue names no files or tests. Done should provide a way to inspect the effective vendor settings of a preset and verify them across inheritance.

Written by the indexing model from the issue text.