* docs: Update Quick Start Guide for Electron 12
With `contextIsolation` enabled by default in Electron 12, the Getting Started Guide no longer works as it is written. In order for the basic example to display values from `process.versions`, we need to add a `preload.js` to the example.
* fix: annotate preload code block with a language
* docs: update quick-start Fiddle example to use preload to provide version info
* fix: ensure example files end in a newline
* docs: add security warning to instructions for turning off contextIsolation
Co-authored-by: John Kleinschmidt <jkleinsc@github.com>
* docs: treat preload as an adjective instead of a noun
Co-authored-by: John Kleinschmidt <jkleinsc@github.com>
Co-authored-by: John Kleinschmidt <jkleinsc@github.com>
* docs: added fiddle support for code samples in quick start guide and features
* docs: removed excessive fiddle links for not final steps
* docs: added eof newlines to fiddle examples
* docs: reworked fiddle examples to be more self-sufficient
* docs: reworked fiddle examples according to mentions
* docs: changed http to https in the offscreen rendering fiddle
* docs: fix recent documents fiddle to be more consistent
