This commit allows quoting of discourse-local-date elements
and converts the quoted tags back into bbcode so that the
rendered quote will also render the discourse-local-date HTML.
This works on single dates as well as date ranges, and supports
all of the options used by discourse-local-date.
This also necessitated adding addTextDecorateCallback to the
to-markdown core lib (similar to addBlockDecorateCallback and
addTagDecorateCallback) to transform the text nodes between
date ranges to remove the -> in the final quote.
c.f. https://meta.discourse.org/t/quotes-that-contain-date-time/101999
This also switches to using the NPM package for better build stability. And adds a clearer label in the alert that is displayed to show your current timezone (when changing timezones).
New range tag for local dates with syntax like:
```
[date-range from=2022-01-06T13:00 to=2022-01-08 timezone=Australia/Sydney]
```
Previously, 2 dates in one line were considered as range. It was hard to decide if 2 dates are range when they were in separate lines or have some content between them.
New explicit tag should clearly distinguish between single date and range.
Common code from `addLocalDate` is extracted to `addSingleLocalDate`.
Both `addLocalDate` and new `addLocalRange` are using `addSingleLocalDate`.
Also, `defaultDateConfig` was extracted to have one place for all possible parameters.
