Differentiate Amplify Gen 1 CLI Custom AWS resources from Amplify Libraries section

[vishal-dms]

Is your feature request related to a problem? Please describe.
Custom AWS resources section is related to Amplify CLI Gen 1 and independent of Amplify Library versions (Like JS v5/v6 , Android v1/v2 etc.). The current doc seems to create confusion that custom resources are a JS v6 or Android v2 only feature (custom resources section does not come up here) which is not true

Describe the solution you'd like
Distinction between Library specific sections and CLI sections. Custom resources section should be accessible without being dependent on library version

Describe alternatives you've considered
N/A

Additional context
N/A