feat: add web flag for codespace list & create subcommand

[doaortu]

This PR could fix #7261

Changes were made:

list subcommand

• adding web flag for opening list of codespace in browser with url: https://github.com/codespaces.
• --web flag can only be used with --repo flag, because in https://github.com/codespaces there only GET param for filtering with repository_id. (no params to filter with user or organizations). It will throws error if used with --user or org flag
• when user only specify --web flag without additional flags, it will open browser with default url: https://github.com/codespaces
• when user specify --web flag with --repo flag, it will first fetch repo_id from the api, and then open browser with url+repo_id param: https://github.com/codespaces?repository_id={id}
• add test case this newly added --web flag with above scenario
• modify the t.Run clause to add the &browser.Stub{} if tt.opts.useWeb is true (on pkg/cmd/codespace/list_test.go)

create subcommand

• adding web flag for creating codespace through browser with url: https://github.com/codespaces
• --web flag cannot be used with --display-name, --idle-timeout, or '--retention-period' flag because there's no option to set those in browser/Web UI. when used with those flags, it will throws error
• when user only specify --web flag without additional flags, it will open browser with default url: https://github.com/codespaces/new
• when user specify --web flag with --repo flag, it will first fetch repo_id from the api, and then open browser with url+repo_id param: https://github.com/codespaces/new?repo={id}&ref={defaultBranch}&machine={firstMachineInList}&location={emptyString}.
• when no machine specified, it will automatically select the first machine instead of displaying machine chooser in terminal. (because already got machine chooser in web UI)
• when no branch specified, it will automatically select the default branch for the repository
• when no location specified, it will yield empty string to the location URL param, because the Web UI will automatically choose default location if none specified.
• when additional flags specified (repo, branch, machine, location) , it will plug the value to the respective params: https://github.com/codespaces/new?repo={id}&ref={specifiedBranch}&machine={specifiedMachine}&location={specifiedLocation}
• add test case this newly added --web flag with above scenario
• modify the t.Run clause to add the &browser.Stub{} if tt.opts.useWeb is true (on pkg/cmd/codespace/create_test.go)

[jkeech]

Thanks for opening this PR! Tagging @cmbrose to help review.

[doaortu]

Thank you. Please let me know if there's anything I can help

[cmbrose]

Thanks for working this up and for updating the tests! It looks solid, just a few thoughts on extra things we might want to include here

[cmbrose]

This is really coming together 🚀 Just a couple last style nits and we can merge this!

[cmbrose]

Looks good! Thanks for working through the iterations!

[doaortu]

Thank you again for the detailed review, and for bearing with me until the end.