EXAMPLES:
    # List all inclusion links with numbers
    iwe inline notes/index --list

    # Inline by reference key
    iwe inline notes/index --reference "architecture"

    # Inline by block number (unambiguous)
    iwe inline notes/index --block 1

    # Preview changes without writing
    iwe inline notes/index --reference "design" --dry-run

    # Keep the target document after inlining
    iwe inline notes/index --block 2 --keep-target

    # Inline as blockquote instead of section
    iwe inline notes/index --reference "notes" --as-quote

    # Output affected document keys for scripting
    iwe inline notes/index --reference "design" -f keys

OUTPUT:

    -f markdown (default): progress messages showing inline action.
    -f keys: one affected document key per line. Matches `iwe find -f keys`
        in shape.
