refreshed "Why VS Code?" page

[mousetraps]

#702

• communicate value prop better
• added "pizazz" (e.g. "an editor that gets out of your way", "delightfully frictionless", "lightning fast", "make it your own", "built with love"... I was on a roll 😉)
• rewrote text to be more concise
• added headers and whitespace to make it more easily scannable
• updated content to reflect more recent state of affairs
• highlight customizability and extensibility more, as well as other key features that tend to be popular

There are enough changes it's probably easiest to read it directly from the branch:
https://github.com/mousetraps/vscode-docs/blob/125b0dedf71793f327058f8894d980be18d7ff34/docs/editor/whyvscode.md

[mousetraps]

cc @waderyan @seanmcbreen @chrisdias - worth a read-through. Also it seems like we are using "code-edit-debug", "code-compile-debug", and "code-build-debug" loop in different places... is there one we should be sticking to?

[gregvanl]

I propose using "edit-build-debug". I prefer "edit" to "code" which is ambiguous and "build" rather than "compile" since there are lots of different pre-production stages (preprocess, transpile, deploy, etc).