Add events list

[luigifab]

Description

Adding full events list with an example.
Not sure if it's the best place.

Edit: I updated version of events of #1670.

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[fballiano]

I really like the idea of having more documentation into the repository but, as far as I've been told, https://github.com/OpenMage/documentation is probably a better place for that.

[github-actions]

Unit Test Results

1 files  ±0  1 suites  ±0   0s ⏱️ ±0s
0 tests ±0  0 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
6 runs  ±0  4 ✔️ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit b771bb4. ± Comparison against base commit 94563c7.