doc: unify titles
Checklist
-
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
doc
Unify capitalization and spaces and add some info for consistency, clarity, and coherence with sorting in the all.md
/ _toc.md
.
- Addons -> C/C++ Addons
- net -> Net
- process -> Process
- punycode -> Punycode
- StringDecoder -> String Decoder
- util -> Util
- Executing JavaScript -> VM (Executing JavaScript)