fix: show description when running workspace generators/schematics

[Cammisuli]

What it does

Shows the description and title when trying to run a workspace generator/schematic

fixes #1224

[nx-cloud]

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CI ran the following commands for commit e57ac49. Click to see the status, the terminal output, and the build insights.

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✅ Successfully ran 3 targets

• nx run-many --all --parallel --target=build --max-parallel=3
• nx run-many --all --parallel --target=test --max-parallel=3
• nx run-many --all --parallel --target=lint --max-parallel=3

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