feat(testing): add e2e tests for code-server and terminal

[jsjoeio]

This PR adds a test for the integrated terminal in code-server.

Changes

• add CodeServer class for simplifying testing (thank you @jawnsy for the POM tip!)
• add test for CodeServer
• add test for terminal
• fix expect in a couple e2e tests (I forgot .toBe(true))

Screenshots

69c0ddcb7541307f217a818f94992163.mp4

Checklist

• tested locally
• added a test
• refactor and use temp folder for terminal test
• use descriptive name like terminal_e2e_test.txt
• fix CodeServer.focusTerminal() method
• remove all TODOs for this PR
• refactor tmpdir
• clean up commits
• try removing waitForTimeouts in terminal.test.ts
• try changing esModuleInterop to false I don't want to mess with this. If someone wants to create a ticket to check out later, go for it. Otherwise, I'll add a note to the "Clean up" issue
• address feedback

[jsjoeio]

Womp. 404. Network issue. I wonder if we could automatically retry if it 404s? cc @oxy

[oxy]

@jsjoeio sadly there's no "please re-run the same step" within an action on GitHub - and we don't have control over @actions/download-artifact's behavior either.

I think I can address this in a future PR where we split up all the things to upload to different artifacts, eg. release-package-macos instead of just everything being in release-packages - or maybe we should file a bug/support request with the actions team? looks to me kind of like a race condition

(file starts uploading from one action (eg. package-macos), and then the other action (eg. docker-arm64) tries to download it but can't because it isn't done uploading yet)

[jsjoeio]

address this in a future PR

Okay, sounds good!

maybe we should file a bug/support request with the actions team?

Yeah, that could be a good idea too! I'll leave that to you if you want.

[code-asher]

I like the new model!

[codecov]

Codecov Report

Merging #3169 (7bfdd13) into main (5ad8e68) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3169      +/-   ##
==========================================
+ Coverage   46.77%   46.86%   +0.08%     
==========================================
  Files          23       23              
  Lines        1193     1195       +2     
  Branches      237      237              
==========================================
+ Hits          558      560       +2     
  Misses        451      451              
  Partials      184      184              

Impacted Files	Coverage Δ
src/node/util.ts	44.56% <ø> (-0.60%)	⬇️
src/node/constants.ts	92.85% <100.00%> (+1.19%)	⬆️
src/node/socket.ts	89.65% <100.00%> (+0.18%)	⬆️

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[jsjoeio]

No coverage uploaded for pull request base (main@72ca12c)

I think this is cause I started this PR before Codecov was added. We'll see though in the next PR on code-server.