Create PR when Application Services makes a release

[tarikeshaq]

Summary

• Adds a Github action that does the following steps:

  • Checks out the repository
  • Sets up python
  • Sets up pyhon dependencies needed for the scripts
  • Gets the last application-services tag from Github
  • Checks if we already updated to the latest release, if so, none of the next steps will run
  • Sets up git commiter information
  • Updates the git submodule to be in-line with the release
  • Updates the Package.swift to have the latest xcframework and checksum
  • Installs Rust so it can be used in the make_tag script
  • installs swiftformat, its need to make sure the code generated is formated
  • runs the make_tag, this could be a no-op if no changes to the udls or uniffi happened, but if there were changes, it would generate any code that needs to be regenerated
  • opens a pull request!

• Adds helper scripts:

  • a script that checks if we already updated is_already_updated.py
  • a script to read the latest tag read_as_tag.py
  • a script to update the Package.swift, update_package_swift.py

  The github action will run every five minutes of the 3pm UTC hour of each day (8am PST)
  (it's set to run every minute, but github limits it to every five minutes, we can change frequency if we'd like though!)

  some minor cleanups for me to do here and there in the scripts, but I ran it a bunch of times on my fork so I think it's tested enough

  Could be a good idea to merge this, see it in action with version 84.5.0 and iterate if that's buggy

[tarikeshaq]

Did a quick round of self-review, I'll address those tomorrow!

[skhamis]

Nice job on this! Will be exciting to get some automation in this repo. Once those nits are fixed, feel free to merge!

[tarikeshaq]

eeeh minor issue I'll deal with next week (darn was hoping this merges today to see it in action): Looks like two of the github actions I use aren't allowed in mozilla repos, and prevent this CI from running 😢 (guess the rules are different for firefox-ios since there are under mozilla-mobile). It's the create-pr and install-swift-tools ones... Shouldn't be too much work to script what they do, I'll get to it early next week