Added mention to the new acronyms extension for Quarto

Several Quarto users were interested in the Acronymsdown package,
but wanted to use it with Quarto rather than RMarkdown. While this
was already feasible (by copying and pasting the Lua files), this
was not an easy nor automated process. Providing a Quarto extension
makes it easier for these users, and will allow us to implement
new features targeting Quarto documents (such as shortcodes).

This commit closes #6.

README.md

@@ -23,6 +23,14 @@ The package documentation can be found online at
 https://rchaput.github.io/acronymsdown, or directly in your R console using
 `vignette("acronymsdown")`.
 
+:sparkles: [Quarto](https://quarto.org/) users should use the new extension
+[acronyms](https://github.com/rchaput/acronyms) instead! :sparkles:
+It has the same features as **Acronymsdown**, but packaged as a Quarto extension
+for easier usage.
+In the future, new features will be implemented **acronyms**; some will be
+backported to **Acronymsdown**, but others (such as shortcodes) are too much
+tied to Quarto.
+
 ## Features
 
 - Tired of manually having to check whether the first occurrence of an

vignettes/advanced_usage.Rmd

@@ -167,6 +167,33 @@ Please refer to the `rmarkdown` documentation for more details, in
 particular `vignette("lua-filters", "rmarkdown")`, `?rmarkdown::output_format`,
 and `?rmarkdown::pandoc_options`.
 
+## Using acronymsdown with Quarto
+
+A specific [Quarto extension](https://github.com/rchaput/acronyms) has been
+developed for Quarto users. It contains all the features of **Acronymsdown**,
+with an even easier usage!
+
+Simply type the following command in your terminal to install the **acronyms**
+Quarto extension:
+
+```sh
+quarto add rchaput/acronyms
+```
+
+Then, load the filter in your document metadata with:
+
+```yaml
+---
+filters:
+  - acronyms
+---
+```
+
+and start using acronyms in your document!
+
+Please refer to the [documentation](https://rchaput.github.io/acronyms) for
+detailed instructions.
+
 ## Using acronymsdown with only Pandoc / without RMarkdown
 
 **acronymsdown** is implemented using a Pandoc [Lua Filter], whereas the R