Docs mdx/markdoc: Add sections on custom options (#1348)

Author: tordans

docs/src/content/pages/fields/markdoc.mdoc

@@ -76,6 +76,24 @@ someContent: |
 
 ---
 
+## Formatting options
+
+The editor can be customised to allow a range of formatting options. This is done via `options`.
+
+See the type signature for `MarkdocEditorOptions` for the full set of options:
+[https://docsmill.dev/npm/@keystatic/core@latest#/.fields.markdoc.MarkdocEditorOptions](https://docsmill.dev/npm/@keystatic/core@latest#/.fields.markdoc.MarkdocEditorOptions)
+
+---
+
+## Image options
+
+The directory where images are stored can be customised in the same way as [`fields.image`](/docs/fields/image) with `directory` and `publicPath`. Though unlike [`fields.image`](/docs/fields/image) outside the editor where image filenames are determined by the key in the schema where the field is, filenames for images in the editor can be customised directly in the editor.
+
+See the type signature for `MarkdocEditorOptions.image` for the full set of options:
+[https://docsmill.dev/npm/@keystatic/core@latest#/.fields.markdoc.MarkdocEditorOptions](https://docsmill.dev/npm/@keystatic/core@latest#/.fields.markdoc.MarkdocEditorOptions)
+
+---
+
 ## Type signature
 
 Find the latest version of this field's type signature at: [https://docsmill.dev/npm/@keystatic/core#/.fields.markdoc](https://docsmill.dev/npm/@keystatic/core#/.fields.markdoc)

docs/src/content/pages/fields/mdx.mdoc

@@ -125,6 +125,24 @@ someContent: |
 
 ---
 
+## Formatting options
+
+The editor can be customised to allow a range of formatting options. This is done via `options`.
+
+See the type signature for `MDXEditorOptions` for the full set of options:
+[https://docsmill.dev/npm/@keystatic/core@latest#/.fields.mdx.MDXEditorOptions](https://docsmill.dev/npm/@keystatic/core@latest#/.fields.mdx.MDXEditorOptions)
+
+---
+
+## Image options
+
+The directory where images are stored can be customised in the same way as [`fields.image`](/docs/fields/image) with `directory` and `publicPath`. Though unlike [`fields.image`](/docs/fields/image) outside the editor where image filenames are determined by the key in the schema where the field is, filenames for images in the editor can be customised directly in the editor.
+
+See the type signature for `MDXEditorOptions.image` for the full set of options:
+[https://docsmill.dev/npm/@keystatic/core@latest#/.fields.mdx.MDXEditorOptions](https://docsmill.dev/npm/@keystatic/core@latest#/.fields.mdx.MDXEditorOptions)
+
+---
+
 ## Type signature
 
 Find the latest version of this field's type signature at: [https://docsmill.dev/npm/@keystatic/core#/.fields.mdx](https://docsmill.dev/npm/@keystatic/core#/.fields.mdx)