Add search bar and filter to cheatsheet

[aeraether]

• [x] Move existing files to appropriate folders
• [x] Generate csv files for python to pull from
• [x] Add app.py to handle reading csv
• [x] Use Jinja to template HTML and import data from python

[aeraether]

Closed in error. Files now moved into appropriate folders without damaging original folder and file integrity.

[raysan5]

@aeraether What is the state of this improvement? As per my understanding, it is a tool to automatically generate the raylib cheatsheet, right? In that case maybe it should be kept on a separate repo...