fix(vscode): only show banner message until nx 17 & don't show project dropdown if no projects

[MaxKless]

No description provided.

[nx-cloud]

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✅ Successfully ran 4 targets

• nx affected --targets=lint,test,build,e2e-ci --configuration=ci --exclude=nx-console --parallel=3
• nx-cloud record -- ./gradlew ktfmtCheck
• nx-cloud record -- npx nx format:check
• nx affected --targets=build,test,e2e-ci --configuration=ci --exclude=nx-console --parallel=3

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