* Make any frontmatter <scheme>:// URI's clickable
http/https links are opened in a new tab/window (via target="_blank"),
other schemes are opened in the current tab, as the browser will prompt
the user to open another application (or do this automatically).
Per https://www.rfc-editor.org/rfc/rfc3986#section-3.1, the scheme must
follow the pattern:
scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
* Make `mailto:...` strings clickable in frontmatter
* Moved YAML library import to index plug (so no async syscalls anymore)
should speed things up
* Merged task and item indexing
* Merged tasks plug into index (questionable)
* taskstate is now no longer a tag, but needs to be configured via
configs