chore: unfork + Yarn v4

[erickzhao]

For the last few years, I've been running https://electronjs.org/apps out of my own personal fork of this repository. This PR brings it back into the mainline of the repo.

I did this very naively by deleting all of the contents of electron/apps and pasting erickzhao/apps back into the repo. I might have lost a few apps in the showcase since the forking, but these haven't been shown since the source of truth was from the fork anyways... so I don't expect any regressions there.

Things that I had done on the fork (main...erickzhao:apps:master):

• Committed 128w images to the git repo.
• Committed index.json and distributed directly from github.com instead of publishing this repo as an npm package.
• Removed screenshots.
• Cleaned stale/broken apps.

Things I did to this PR:

• Removed colour generation algorithms and dependencies.
• Minimized other dependencies wherever possible.
• Fixed GitHub Actions to be pinned to SHAs.
• Migrated this repo to Yarn v4.
• Upgraded existing dependencies wherever possible.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	husky@​8.0.1 ⏵ 8.0.3	+1		+1
	slugify@​1.6.6
	yaml@​2.2.2 ⏵ 2.8.1	+1
	sinon@​14.0.0 ⏵ 21.0.0			-2	+1
	chai@​3.5.0 ⏵ 6.2.0	+1		+4
	sharp@​0.32.6 ⏵ 0.34.4	-5		+1		+31
	prettier@​2.6.2 ⏵ 3.6.2
	semver@​7.5.4 ⏵ 7.7.3	+1		+1
	mocha@​10.0.0 ⏵ 11.7.4	+1		+1	-2
	lint-staged@​12.4.1 ⏵ 12.5.0			+1	-1
	inquirer@​8.2.4 ⏵ 8.2.7

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[socket-security]

Warning

Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		Deprecated by its maintainer: npm @types/minimatch Reason: This is a stub types definition. minimatch provides its own type definitions, so you do not need this installed. From: ? → npm/imagemin@7.0.1 → npm/@types/minimatch@6.0.0 ℹ Read more on: This package | This alert | What is a deprecated package? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Research the state of the package and determine if there are non-deprecated versions that can be used, or if it should be replaced with a new, supported solution. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore npm/@types/minimatch@6.0.0. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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[dsanders11]

Couple of non-blocking comments.