Add two standalone Python tools for deep comparison and analysis of .3mf
slicing project files:
- compare_slices.py: comprehensive slice comparison with filament usage,
nozzle mapping, tool change sequences, prime tower analysis, temperature
timeline, and automatic critical discrepancy detection
- show_temp_plot.py: interactive HTML temperature timeline plotter for
visualizing heater profiles during multi-nozzle prints
Both tools use only Python stdlib (no external dependencies).
Primary use case: regression testing H2C carousel purge volumes and
BBS compatibility verification.
