Add doc for editor settings hooks (#1366)

* Add docs for settings panel hooks

* Minor tweaks

* Fix ##

* Update settings-panel.md

* Update settings-panel.md

* Add @p-jackson to CONTRIBUTORS

Co-authored-by: Rich Tabor <hello@themebeans.com>

CONTRIBUTORS.md

@@ -25,3 +25,4 @@ This list is manually curated to include valuable contributions by volunteers th
 | @broken8        | @adomenico             |
 | @andreilupu     | @euthelup              |
 | @alexdenning    | @alexdenning           |
+| @p-jackson      |                        |

docs/hooks/settings-panel.md

@@ -0,0 +1,32 @@
+# Editor Settings
+
+## Customize labels
+
+The following JavaScript filter will customize the text used for the menu item
+label and panel titles: 
+
+```javascript
+import { addFilter } from '@wordpress/hooks';
+
+function updateSettingsTitle() {
+	return __( 'Here is a new title!', 'textdomain' );
+}
+
+addFilter(
+	'coblocks-settings-title',
+	'coblocks-settings-title',
+	updateSettingsTitle,
+);
+```
+
+## Disable the modal entirely
+
+The following `PHP` filter can be used to prevent the editor settings panel from appearing within the editor.
+
+```php
+add_filter( 'coblocks_show_settings_panel', '__return_false' );
+```
+
+## Screenshots
+![editor-settings](https://user-images.githubusercontent.com/1813435/74862708-9c043d00-531a-11ea-9410-61968ad0e86d.jpg)
+![editor-settings-open](https://user-images.githubusercontent.com/1813435/74862836-cfdf6280-531a-11ea-987c-2f795557b2d3.jpg)