Add event naming rule to code conventions

[Pikachu920]

Description

Adds a naming rule for Event objects to the code conventions. Currently, some contributors use e and others use event. I think we should probably find a standard before this inconsistency continues to grow in the codebase. While my vote would be for using e, I mostly opened this PR as a place to hold the discussion. The actual standard should be whatever most of us agree on.

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Target Minecraft Versions: any
Requirements: any
Related Issues: any

[Moderocky]

I’m always in favour of more rules, but I would vote for event.
For my reasoning you can read my public code standards and style guide.

[Pikachu920]

I’m always in favour of more rules, but I would vote for event. For my reasoning you can read my public code standards and style guide.

yeah now that i think about it, I think event is better. my main rationale for using e was that it is (i think) already the most common name for it in the codebase, but it gets obnoxious when dealing with exceptions.

[Pikachu920]

Please discuss in #4993

[TheLimeGlass]

Closed in favor of more than majority of team agreeing with event