feat!: upgrade to oclif/core v4

[eablack]

W-18293658
W-18293803
W-18293826

Description

1 Major Updates:

• Migrated to oclif/core v4
• Upgraded to ESLint 8 with rule fixes
• Switched from Yarn to npm package manager
• Updated various dependencies

2 Configuration Changes:

• Added conventional-changelog-cli which will be run on every publish and add entries to CHANGELOG.md
• Added .eslintrc.js (replacing .eslintrc)
• Updated .github/workflows/ci.yml
• Modified .github/dependabot.yml
• Added .github/CODEOWNERS
• Removed .circleci/config.yml

3 Code Changes:

• Added examples/run.sh to run example commands
• Modified multiple source files in src/ directory
• Updated test files to match the new changes
• Removed yarn.lock

4 Documentation and Examples:

• Updated README.md
• Modified example files (examples/login.ts, examples/logout.ts) and added new ones
• Added conventional changelog support

5 Package Management:

• Switched from Yarn to npm
• Updated various dependencies in package.json
• Added package-lock.json
• Removed yarn.lock

Testing

Nothing in our CLI is using the oclif/core v4 yet. However, I have add several example commands that can be tested via a newly created helper via:

1. Pull down this branch and npm install
2. npm run example EXAMPLE_COMMAND where EXAMPLE_COMMAND is one of the commands in ./examples

[k80bowman]

There are a TON of great improvements in here, thank you for going through all of this. I have one potential improvement, but it's not blocking. Great work!