Gdsfactory

- test lengths for routes
- pytest are passing now for windows
- Fixed the spiral circular error by snapping length to 1nm (windows only)
- Testing now for windows and linux in the CICD
- Made the multiprocessing calls pickeable by removing the logger function (that wasn't doing much anyway)
- extend_ports: maintains un-extended ports

- fixing sorting of ports in bundle routing: Thanks to Troy Tamas
- added `factory: optical` and `settings:` in component_from_yaml routes
- write more container metadata for component inside the container (function_name, module ....)
- more checks for the grating coupler decorator (W0 port with 180 degrees orientation)
- CI/CD tests run also on pull requests
- added pp.clear_cache() and call it when we run `c.show()`
- use pp.clear_cache() when testing component port positions

- added grating coupler decorator to assert polarization and wavelength
- component_from_yaml function allows route filter input
- routes_factory: in pp.routing (optical, electrical)
- routes: in component_from_yaml allows route_factory
- no more routes and route_bundles: now it's all called routes, and you need to specify the routing factory function name [optical, electrical ...]
- renamed component_type2factory to component_factory
- explained factory operation in notebooks/02_components.ipynb
- mzi.py DL is now the actual delta_length

- improved notebooks (thanks to phidl tutorial)
- added C and L components from phidl
- print(component) returns more info (similar to phidl)
- support new way of defining waveguides with pp.Path, pp.CrossSection and pp.path (thanks to phidl)

- clean metadata dict recursively

- renamed add_io_optical to add_fiber_array
- added taper factory and length to add_fiber_single
- fixed JSON metadata for Components with function kwargs
- fixed reference positions in component_from_yaml
- added bundle_routes option in component_from_yaml