doc: improve napi formatting

This addresses two nits: 1. Bullet points that span over multiple lines should be indented consitently. Otherwise they are not always properly highlighted. 2. Lines breaks after titles improve the readability. PR-URL: #30772 Reviewed-By: Beth Griggs <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Rich Trott <[email protected]>

Author: BridgeAR