Fix build download command required scopes (buildkite#457)

Co-authored-by: Ben McNicholl <[email protected]>

🐛 Fix the API req for validate (buildkite#451)

* 🐛 Fix the API req for validate

* 🎨 Formatted the thing.

* 🎨 Fix nil pointer issues

🎨 Split out HTTP logic to package. Use it. (buildkite#447)

✨ Show org in prompt (buildkite#442)

api scopes for all build commands (buildkite#420)

Co-authored-by: Lizette Rabuya <[email protected]>

produce actionable error (buildkite#426)

Only use a spinner on a tty (buildkite#409)

Otherwise this command fails with errors about missing a tty when used
in scripts on CI.

Environment Variable config (buildkite#408)

* Upgrade Go to 1.23.3

* Allow configuring API token and org slug via environment variable

* Allow configuring REST API endpoint by environment variable

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Co-authored-by: Ben McNicholl <[email protected]>

Update go-buildkite to v4.0.1 (buildkite#384)

This fixes an issue in the `bk build create` command, which would always fail using v4.0.0

Remove the beta caveat on brew post-install (buildkite#383)