Add post-release manual step

[isaacroldan]

WHY are these changes introduced?

To improve the post-release workflow by consolidating GitHub authentication logic and adding a new post-release script that automates documentation and homebrew updates.

WHAT is this pull request doing?

• Extracts common GitHub authentication logic into a new github-utils.js module
• Creates a new post-release script that ensures releases are made from stable branches
• Moves command execution logic into a separate run-command.js module
• Adds a new post-release npm script to package.json
• Updates existing scripts to use the new shared authentication utilities

How to test your changes?

TBD

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes

[isaacroldan]

• Add post-release manual step #5449 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	75.91%	9110/12001
🟡	Branches	71.06%	4454/6268
🟡	Functions	75.52%	2375/3145
🟡	Lines	76.47% (+0.01% 🔼)	8604/11252

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / app-event-watcher.ts	95.18% (-1.2% 🔻)	86.49% (-2.7% 🔻)	95.45%	100%

Test suite run success

2065 tests passing in 922 suites.

Report generated by 🧪jest coverage report action from a5b6894