docs(common): Refine NgOptimizedImage docs (#48035)
docs(common): Refine NgOptimizedImage docs (#48035)

Make several changes to the structure of the documentation, based on early feedback about the readability and usefulness of the docs.

PR Close #48035

angular/angular,angular/angular,angular/angular,angular-indonesia/angular,angular-indonesia/angular,angular/angular,angular-indonesia/angular,angular-indonesia/angular