docs(content-docs): add api doc for displayed_sidebar front matter (#…

…8146)

website/docs/api/plugins/plugin-content-docs.md

@@ -278,6 +278,7 @@ Accepted fields:
 | `sidebar_position` | `number` | Default ordering | Controls the position of a doc inside the generated sidebar slice when using `autogenerated` sidebar items. See also [Autogenerated sidebar metadata](/docs/sidebar#autogenerated-sidebar-metadata). |
 | `sidebar_class_name` | `string` | `undefined` | Gives the corresponding sidebar label a special class name when using autogenerated sidebars. |
 | `sidebar_custom_props` | `string` | `undefined` | Assign custom metadata to the sidebar item referencing this doc. |
+| `displayed_sidebar` | `string` | `undefined` | Force the display of a given sidebar when browsing the current document. Read the [multiple sidebars guide](../../guides/docs/sidebar/multiple-sidebars.md) for details. |
 | `hide_title` | `boolean` | `false` | Whether to hide the title at the top of the doc. It only hides a title declared through the front matter, and have no effect on a Markdown title at the top of your document. |
 | `hide_table_of_contents` | `boolean` | `false` | Whether to hide the table of contents to the right. |
 | `toc_min_heading_level` | `number` | `2` | The minimum heading level shown in the table of contents. Must be between 2 and 6 and lower or equal to the max value. |

website/versioned_docs/version-2.0.1/api/plugins/plugin-content-docs.md

@@ -274,6 +274,7 @@ Accepted fields:
 | `sidebar_position` | `number` | Default ordering | Controls the position of a doc inside the generated sidebar slice when using `autogenerated` sidebar items. See also [Autogenerated sidebar metadata](/docs/sidebar#autogenerated-sidebar-metadata). |
 | `sidebar_class_name` | `string` | `undefined` | Gives the corresponding sidebar label a special class name when using autogenerated sidebars. |
 | `sidebar_custom_props` | `string` | `undefined` | Assign custom metadata to the sidebar item referencing this doc. |
+| `displayed_sidebar` | `string` | `undefined` | Force the display of a given sidebar when browsing the current document. Read the [multiple sidebars guide](../../guides/docs/sidebar/multiple-sidebars.md) for details. |
 | `hide_title` | `boolean` | `false` | Whether to hide the title at the top of the doc. It only hides a title declared through the front matter, and have no effect on a Markdown title at the top of your document. |
 | `hide_table_of_contents` | `boolean` | `false` | Whether to hide the table of contents to the right. |
 | `toc_min_heading_level` | `number` | `2` | The minimum heading level shown in the table of contents. Must be between 2 and 6 and lower or equal to the max value. |

website/versioned_docs/version-2.1.0/api/plugins/plugin-content-docs.md

@@ -276,6 +276,7 @@ Accepted fields:
 | `sidebar_position` | `number` | Default ordering | Controls the position of a doc inside the generated sidebar slice when using `autogenerated` sidebar items. See also [Autogenerated sidebar metadata](/docs/sidebar#autogenerated-sidebar-metadata). |
 | `sidebar_class_name` | `string` | `undefined` | Gives the corresponding sidebar label a special class name when using autogenerated sidebars. |
 | `sidebar_custom_props` | `string` | `undefined` | Assign custom metadata to the sidebar item referencing this doc. |
+| `displayed_sidebar` | `string` | `undefined` | Force the display of a given sidebar when browsing the current document. Read the [multiple sidebars guide](../../guides/docs/sidebar/multiple-sidebars.md) for details. |
 | `hide_title` | `boolean` | `false` | Whether to hide the title at the top of the doc. It only hides a title declared through the front matter, and have no effect on a Markdown title at the top of your document. |
 | `hide_table_of_contents` | `boolean` | `false` | Whether to hide the table of contents to the right. |
 | `toc_min_heading_level` | `number` | `2` | The minimum heading level shown in the table of contents. Must be between 2 and 6 and lower or equal to the max value. |