Build FXIOS-13790 [AS] Add script to automate building and comsuming a local AS build

[issammani]

📜 Tickets

Jira ticket
Github issue

💡 Description

This PR:

• Adds use_local_as.sh script to automate building and comsuming an AS build.
• The steps on the script roughly map to the manual flow as described in [1] and [2]

⚠️ Will update the wiki we have on iOS since it's very outdated after this merges.

🎥 Demos

Before	After

Demo

📝 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

[mobiletest-ci-bot]

🧹 Tidy commit

Just 1 file(s) touched. Thanks for keeping it clean and review-friendly!

💬 Description craftsman

Great PR description! Reviewers salute you 🫡

✅ Per-file coverage

All changed files meet the threshold of 35.0%.

Generated by 🚫 Danger Swift against d130fe9

[cyndichin]

Running script shows me a successful log, let me know if I should be testing anything else. I'll let @skhamis review the script itself. Nothing stands out to me. Thanks for adding the comments

[skhamis]

Love the PR @issammani! Had one thought about maybe splitting the scripts but let me know if you feel strongly against that. Overall does look good though!

[skhamis]

This is fantastic! However I wonder if we should potentially split the scripts here. I think for most people regularly doing dev on a-s -> iOS, most of the above script is not necessarily needed. Starting from here is really the (awesome) driver that most devs would be interested in. Should we split the above to go in some kinda "appservices_bootstrap" and the below is actual use_local_as.sh? That might make it easier to maintain in the future.

Also I do worry a little about when appservices moves to monorepo the above might change in some form. I'm half wondering if there should be something like "go to X to see the set-up for appservices" or something like that. However that can be tweaked in the future as we try to get the flow more stable!