Typos discovered by codespell

[cclauss]

This is a Good First Issue to fix the following typos

./video_to_ascii/cli.py:8: usefull ==> useful
./video_to_ascii/render_strategy/ascii_strategy.py:72: correcly ==> correctly
./video_to_ascii/render_strategy/ascii_strategy.py:72: builded ==> built
./video_to_ascii/render_strategy/image_processor.py:1: usefull ==> useful
./video_to_ascii/render_strategy/image_processor.py:14: apropiate ==> appropriate
./video_to_ascii/render_strategy/image_processor.py:23: apropiate ==> appropriate
./video_to_ascii/render_strategy/image_processor.py:57: brighness ==> brightness
./bin/video-to-ascii:6: usefull ==> useful