fixed dependencies that were preventing IDE builds

[w1gs]

This PR fixes issues that were preventing the full IDE from being built. Mainly the original-fs dependency was added as it's required in the out/bootstrap-amd.js file. Additionally, it moves the diff dev dependency in the extension to the main extension dependencies since this was preventing the extension from loading in the compiled IDE.

Error in compiled IDE related to diff package:

Code where original-fs dependency is required:

[jcommaret]

@andrewpareles The fix worked perfectly ! Thank you @w1gs

I am giving me a little pause to write some documentation for Mac OS ARM ;)