docs(frontmatter): mention dealiasing related fields (#1715)

* Added to the documentation which values of frontmatter are referenced.

* The source code I was looking at seemed to be out of date and the wrong listings were corrected.

* The list of frontmatter was moved to Frontmatter.md and a link was added.

docs/plugins/Frontmatter.md

@@ -17,6 +17,54 @@ This plugin accepts the following configuration options:
 > [!warning]
 > This plugin must not be removed, otherwise Quartz will break.
 
+## List
+
+Quartz supports the following frontmatter:
+
+- title
+  - `title`
+- description
+  - `description`
+- permalink
+  - `permalink`
+- comments
+  - `comments`
+- lang
+  - `lang`
+- publish
+  - `publish`
+- draft
+  - `draft`
+- enableToc
+  - `enableToc`
+- tags
+  - `tags`
+  - `tag`
+- aliases
+  - `aliases`
+  - `alias`
+- cssclasses
+  - `cssclasses`
+  - `cssclass`
+- socialDescription
+  - `socialDescription`
+- socialImage
+  - `socialImage`
+  - `image`
+  - `cover`
+- created
+  - `created`
+  - `date`
+- modified
+  - `modified`
+  - `lastmod`
+  - `updated`
+  - `last-modified`
+- published
+  - `published`
+  - `publishDate`
+  - `date`
+
 ## API
 
 - Category: Transformer