Add .yarnrc.yml and update package.json for Yarn 4.9.1 support

Author: syofyanzuhad

.yarn/install-state.gz

@@ -0,0 +1,3 @@
+nodeLinker: node-modules
+
+yarnPath: .yarn/releases/yarn-4.9.1.cjs

.yarn/releases/yarn-4.9.1.cjs

@@ -8,7 +8,6 @@
 		"url": "https://herper.io/"
 	},
 	"license": "MIT",
-	"private": false,
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/jakeherp/portfolio"
@@ -128,5 +127,6 @@
 	"engines": {
 		"npm": ">=9",
 		"node": ">=20"
-	}
+	},
+	"packageManager": "yarn@4.9.1"
 }