Gdsfactory

- [Mode field profile interpolation + overlap integrals](https://github.com/gdsfactory/gdsfactory/pull/170)
- [Properly serialize transitions](https://github.com/gdsfactory/gdsfactory/pull/171)

- Consider only changed component args and kwargs when calculating hash for component name
- meep plugin write_sparameters_meep_mpi deletes old file when overwrite=True
- ensure write_sparameters_meep `**kwargs` have valid simulation settings
- fix component lattice mutability
- Component.auto_rename_ports() raises MutabilityError if component is locked
- add `Component.is_unlocked()` that raises MutabilityError
- rename component_lattice `components` to `symbol_to_component`
- raise error when trying to add two ports with the same name in `gf.add_ports.add_ports_from_markers_center`. Before it was just ignoring ports if it already had a port with the same name, so it was hard to debug.
- difftest adds failed test to logger.error, to clearly see test_errors and to log test error traces
- clean_value calls clean_value_json, so we only need to maintain one function to serialize both settings and name

- fix tests

- rename `padding_north`, `padding_west`, `padding_east`, `padding_south` -> `ymargin_top`, `xmargin_left`, `xmargin_right`, `ymargin_bot` for consistency of the meep plugin with the Lumerical plugin.
- add `write_sparameters_meep_lr` with left and right ports and `write_sparameters_meep_mpi_lt` with left and top ports
- add xmargin and ymargin to write_sparameters_meep

- add Optional nslab to gm.modes.get_mode_solver_rib
- add `padding_north`, `padding_west`, `padding_east`, `padding_south`
- add tqdm progress bar to meep sims

- make trimesh an optional dependency by moving imports inside function