* YAML frontmatter as a JSON object in `notes.metadata`
* Print metadata from the YAML frontmatter in `list` output using `{{metadata.<key>}}`, e.g. `{{metadata.description}}`. Keys are normalized to lower case.
* Start and end offsets for link snippets.
* This could be useful to expand backlinks contexts.
Filter notes by their tags using `--tag "history, europe"`. To match notes associated with either tags, use a pipe `|` or `OR` (all caps), e.g. `--tag "inbox OR todo"`.
