📝 add README.rst

Author: userElaina

README.rst

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+BadApple
+========
+
+Python Module: Play the video in the console as ASCII art.
+
+Where there is light, there is [Bad Apple!!][ba]
+
+Install
+-------
+
+.. code-block:: shell
+    python -m pip install badapple
+
+Run
+---
+
+.. code-block:: shell
+    python -m badapple
+
+Help message
+------------
+
+.. code-block:: md
+    usage: badapple [options] ... 
+
+    BadApple-Python-OS-ISA-v0.0.3
+
+    options:
+    -h, --help            show this help message and exit
+    --help_audio          show avaliable players
+    -i INPUT, --input INPUT
+                            video file (use _BA_MP4 or _BA_BA to load built-in video)
+    -o OUTPUT, --output OUTPUT
+                            preload output file
+    --font FONT           font data file
+    --audio AUDIO         audio file (use _BA_WAV, _BA_MP3 or _BA_MP4 to load built-in audio)
+    --audio_player AUDIO_PLAYER
+                            audio player [auto ffplay avplay mpv vlc mpg123 cmus simpleaudio pyaudio playsound pydub]
+    -s SCALE, --scale SCALE
+                            width:height
+    -r RATE, --rate RATE  frame rate
+    --not_clear           not clear screen (with ANSI) before each frame
+    --contrast            contrast enhancement
+    --preload             preload video (not play)
+    --debug               debug
+
+[ba]: https://www.youtube.com/watch?v=FtutLA63Cp8