Defining file naming convention

We have a variety of resources but we do not document how they should be named. I will list the types below with the convention next to them once they are decided.
- Meeting Minutes
- Presentations (pptx, pdf and sometimes others)
- Tutorials:
  - Slides
  - Videos
  - Subtitles
  - Folder of individual tutorials
- Simple markdown documents (mostly Readmes for now)