* refactor: remove js2asar.py and port logic to JS in more readable / GN-style way
* refactor: further clean up ASAR impl, add new node_action GN template
* Disable nodeIntegration
* Enable contextIsolation
* Re-implement the CSP security check to handle running in
contextIsolation
* Disable bad DCHECKS for the promise helper
* Remove the unused "-d" flag for the electron binary
* Added a way to hide the default help output for electron devs who
don't want to see it every time
* feat: deprecate default value of nodeIntegration
* Use DeprecationStatus::Stable as the default instead of shadowing
* change wording of deprecations
* chore: also deprecate kWebviewTag and kContextIsolation
* chore: do as we preach, lets be secure-by-default in the default app