Move esbuild-esm-loader as devDependency of theme package

See: #72847 (comment)

Author: aduth

package-lock.json

@@ -109,7 +109,6 @@
 		"deep-freeze": "0.0.1",
 		"equivalent-key-map": "0.2.2",
 		"esbuild": "0.25.10",
-		"esbuild-esm-loader": "0.3.3",
 		"escape-html": "1.0.3",
 		"eslint-import-resolver-node": "0.3.4",
 		"eslint-plugin-eslint-comments": "3.1.2",

package.json

@@ -43,6 +43,9 @@
 		"@wordpress/private-apis": "file:../private-apis",
 		"colorjs.io": "^0.5.2"
 	},
+	"devDependencies": {
+		"esbuild-esm-loader": "0.3.3"
+	},
 	"peerDependencies": {
 		"react": "^18.0.0",
 		"react-dom": "^18.0.0"