Add macos interaction.pressKeys

[mzgoddard]

• Add loadOsModule to load interaction and session modules depending on process.platform
• Define modules and command types in lib/modules/types.js
• Move existing interaction and session modules into lib/modules/win32
• Add lib/modules/macos
• Add lib/helpers/macos with types and functions to parse key combination into an applescript and execute it with osascript

[jugglinmike]

Years ago, in the context of the "harness" project, we agreed that unverifiable structured comments degrade the quality of a codebase. Seeing the same patterns being introduced here in this project, my preference is to extend the automated validation process, but I'd settle for documentation that describes how contributors can perform the validation manually. Barring either of those solutions, we should remove the comments.

[mzgoddard]

@jugglinmike, I made these changes:

• Rebased onto main and resolved conflict in package.json
• Added await to retryOnTimeout test
• Added retryOnTimeout test that forwards non timeout error
• Turned testEach into suites with individual test('name', () => { per testEach member in test/helpers/macos/applescript.js
• Throw in retryOnTimeout if it retries too many times
• Replace Applescript.Script.script with .source
• Separated renderScript template string into subfunctions and variables
• Fixed @type uses to get Typescript to type check

[jugglinmike]

Sorry for the delay, @mzgoddard; I got sidetracked by a test failure which is also occurring on the main branch. Now that I know this patch is unrelated, we can merge it and take on that problem separately.

(By the way, the code style also doesn't validate on main--we really need to get CI set up!)