* created a method remove_all_except() in scene.py and interactive_scene.py
* Made it such that default mobject colors can be set through the yaml config file.
* * Default color initialisation wasn't working.
Changed conditional expression to `or` instead.
* Added default values to yaml file.
* added set_background_color() function to Scene class
* Changed default font back to Consolas
* Comment tweak
* Directly print traceback
Since the shell.showtraceback is giving some issues
* Make InteracrtiveSceneEmbed into a class
This way it can keep track of it's internal shell; use of get_ipython has a finicky relationship with reloading.
* Move remaining checkpoint_paste logic into scene_embed.py
This involved making a few context managers for Scene: temp_record, temp_skip, temp_progress_bar, which seem useful in and of themselves.
* Change null key to be the empty string
* Ensure temporary svg paths for Text are deleted
* Remove unused dict_ops.py functions
* Remove break_into_partial_movies from file_writer configuration
* Rewrite guarantee_existence using Path
* Clean up SceneFileWriter
It had a number of vestigial functions no longer used, and some setup that could be made more organized.
* Remove --save_pngs CLI arg (which did nothing)
* Add --subdivide CLI arg
* Remove add_extension_if_not_present
* Remove get_sorted_integer_files
* Have find_file return Path
* Minor clean up
* Clean up num_tex_symbols
* Fix find_file
* Minor cleanup for extract_scene.py
* Add preview_frame_while_skipping option to scene config
* Use shell.showtraceback function
* Move keybindings to config, instead of in-place constants
* Replace DEGREES -> DEG
This simply didn't work, and had no resilience to changes to the library. For cases where this might be useful, it's likely much better deliberately save specific data which is time-consuming to generate on the fly.
