Make wordpress/fields a private package (#65269)

Co-authored-by: oandregal <oandregal@git.wordpress.org>
Co-authored-by: gziolo <gziolo@git.wordpress.org>

Author: oandregal

docs/manifest.json

@@ -1697,12 +1697,6 @@
 		"markdown_source": "../packages/eslint-plugin/README.md",
 		"parent": "packages"
 	},
-	{
-		"title": "@wordpress/fields",
-		"slug": "packages-fields",
-		"markdown_source": "../packages/fields/README.md",
-		"parent": "packages"
-	},
 	{
 		"title": "@wordpress/format-library",
 		"slug": "packages-format-library",

packages/fields/package.json

@@ -9,6 +9,7 @@
 		"gutenberg",
 		"dataviews"
 	],
+	"private": true,
 	"homepage": "https://github.com/WordPress/gutenberg/tree/HEAD/packages/fields/README.md",
 	"repository": {
 		"type": "git",