doc: add quotes for event names + fix similar nits

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• documentation is changed or added
• commit message follows commit guidelines

I've tried to process all the patterns I could think of to unify event name mentions so that they always would be wrapped in a `'name'` way.

During the overhaul, I've found some other nits and fixed them in passing:

• missing parentheses after function/method names;
• missing backticks around code fragments;
• missing '' around other string values;
• wrong '' around other non-string values;
• possible typos (like `unref`d instead of `unref`ed);
• wrong statements (like 'end' event for readable stream instead of 'finish' event);
• confusing definitions (like "process.on('message') event" instead of just "'message' event");
• unneeded snake case in parameter names;
• property types omission;
• sporadic 80 chars length violations;
• a few nits in the sorting of bottom references.

These small changes can distract during reviews, but creating many PRs just for them seems to be an even bigger burden.