refactor!: upgrade to oclif/core

[eablack]

GUS WI

Description

• Migrates from pre-oclif/core to oclif/core 2
• Fixes /bin/run to work with oclif/core
• Resolves many eslint errors, add linting to ci
• Updates http-call package, resolving a known bug
• Updates misc packages to more recent versions, some of which should resolve security vulnerabilities
• Update .tool-versions to node 20
• Resolves a bug preventing manifest:diff from working properly

Testing

1. Pull down this branch and yarn build
2. Run ./bin/run addons:admin:manifest:pull ADDON_NAME (i used our staging scheduler addon)
3. See that it creates a local manifest file with the right contents
4. Run ./bin/run addons:admin:open
5. See that it opens the addon in the partner portal based on data in the manifest just created
6. Make a minor edit to the addon-manifest.json file
7. Run ./bin/run addons:admin:manifest:diff and see the diffed output
8. Run ./bin/run addons:admin:generate and follow the prompts with fake data
9. See that it creates a local manifest file with the right contents
10. Test 1 or 2 more random commands

• note: be very careful if you test with destructive commands if you test them. addons:admin:manifests:push for instance will update the remote manifest. please don't do that for any of our production addons.