Update FXIOS-15319 Move bootstrap to archived-scripts and update READMEs

[adudenamedruby]

📜 Tickets

Jira ticket
Github issue

💡 Description

Title.

📝 Checklist

• I filled in the ticket numbers and a description of my work
• I updated the PR name to follow our PR naming guidelines
• I ensured unit tests pass and wrote tests for new code
• If working on UI, I checked and implemented accessibility (Dynamic Text and VoiceOver)
• If adding telemetry, I read the data stewardship requirements and will request a data review
• If adding or modifying strings, I read the guidelines and will request a string review from l10n
• If needed, I updated documentation and added comments to complex code

[adudenamedruby]

Still working on this. I have to replace all the bootstrap stuff first in GH jobs too lolololo

[mobiletest-ci-bot]

	Warnings
⚠️	Extra details help! Your description section is a bit short (6 characters). Adding a bit more context will make reviews smoother.
⚠️	Detected shell script changes in: archived-scripts/bootstrap.sh (cc @adudenamedruby)

🧹 Tidy commit

Just 4 file(s) touched. Thanks for keeping it clean and review-friendly!

🌟 Documentation star

Great documentation touches. Future you says thank you! 📚

✅ New file code coverage

No new file detected so code coverage gate wasn't ran.

Generated by 🚫 Danger Swift against c22196c

[lmarceau]

Shouldn't we provide some guidance for contributors to know how to build the code? At least pointing to fxios?

Also some steps should stay IMO even with fxios:

1. Open the `Client.xcodeproj` under the `firefox-ios` folder in Xcode.
1. Make sure to select the `Fennec` [scheme](https://developer.apple.com/documentation/xcode/build-system?changes=_2) in Xcode.
1. Select the destination device you want to build on.
1. Run the app with `Cmd + R` or by pressing the `build and run` button.

⚠️ Important: In case you have dependencies issues with SPM, please try the following:

- Xcode -> File -> Packages -> Reset Package Caches

[adudenamedruby]

These steps all exist in the main readme for fxios

[lmarceau]

But if I am a contributor, how do I know I need to use fxios ?

[adudenamedruby]

That information already exist in the main README :)

[lmarceau]

Same comment about Focus

[adudenamedruby]

These steps all exist in the main readme for fxios

[github-actions]

This PR has been automatically marked as stale. Please leave any comment to keep this PR opened. It will be closed automatically if no further update occurs in the next 7 days. Thank you for your contributions!