feat: 🎸 added models option in lb4 discover cli command

[punitdiwan]

added --models option inside lb4 discover command to generate specific models

BREAKING CHANGE: 🧨 no

✅ Closes: #7104

Signed-off-by: Punit Diwan [email protected]

Checklist

• [x] DCO (Developer Certificate of Origin) signed in all commits
• [x] npm test passes on your machine
• [x] New tests added or existing tests modified to cover all changes
• [x] Code conforms with the style guide
• [ ] API Documentation in code was updated
• [x] Documentation in /docs/site was updated
• [ ] Affected artifact templates in packages/cli were updated
• [ ] Affected example projects in examples/* were updated

U have added a new feature using which we can generate individual models using the discover command of lb4-cli command. @raymondfeng Please review and approve.