This commit updates the location of the Image Directive guide link in the left navigation menu. Now the link is located under the Feature Preview section.
Also, this commit updates the Image Directive guides to add a highlighted message that the directive is in the developer preview mode.
PR Close#47466
Add a new page in developers guide section with the general
overview of the standalone components, directives and pipes
Additional APIs (bootstrapApplication, router, DI) as also
covered.
PR Close#46058