Latest comments: Add color block support (#63419)

Adds text, background, gradient, and link color support to the Latest comments block.
Background, text and link are set to show by default.

Co-authored-by: carolinan <poena@git.wordpress.org>
Co-authored-by: ndiego <ndiego@git.wordpress.org>

docs/reference-guides/core-blocks.md

@@ -396,7 +396,7 @@ Display a list of your most recent comments. ([Source](https://github.com/WordPr
 
 -	**Name:** core/latest-comments
 -	**Category:** widgets
--	**Supports:** align, interactivity (clientNavigation), spacing (margin, padding), typography (fontSize, lineHeight), ~~html~~
+-	**Supports:** align, color (background, gradients, link, text), interactivity (clientNavigation), spacing (margin, padding), typography (fontSize, lineHeight), ~~html~~
 -	**Attributes:** commentsToShow, displayAvatar, displayDate, displayExcerpt
 
 ## Latest Posts

packages/block-library/src/latest-comments/block.json

@@ -29,6 +29,15 @@
 	},
 	"supports": {
 		"align": true,
+		"color": {
+			"gradients": true,
+			"link": true,
+			"__experimentalDefaultControls": {
+				"background": true,
+				"text": true,
+				"link": true
+			}
+		},
 		"html": false,
 		"spacing": {
 			"margin": true,