Documentation mega issue

Produce docs/user guide to give to the game dev club with handover.

Structure of documentation:
```
admin-dashboard
events
members
committee
contributors
games
art
showcases
pages
landing
about-committee
automation - adding games automatically from itch game jams
deployment

```
^ above structure should go in a /documentation directory next to src and public

**for admin dashboard docco pages:**
- each page should contain a list of the fields that need to be filled out to create a new entry and a short explanation of each
- explain any noteworthy cases where filling out a field a certain way causes a major difference on the frontend. e.g. rendering an itch widget vs a non itch widget
- for fields that need information to be filled from itch.io, a description of where to get this information from should be included
- the process for adding, managing, and removing admin accounts who can access the admin site

**for frontend page docco**
- each page should cover what the committee need to do to change any hardcoded chunks of text or images on the page

- so far i think only the landing page and about/committee page have sections like this