Is your feature request related to a problem? Please describe.
I'm frustrated when working with long notes because obsidian-cli open can only open notes at the top level. The command lacks section navigation, forcing manual scrolling through long documents

Describe the solution you'd like
Add a --section flag to the open command for direct section navigation using obsidian's URI scheme support.

Usage: obsidian-cli open "note-name" --section "section-name"

Additional context
Section names must match exact heading text (case-sensitive) and work for any heading level.