chore: properly apply Prettier formatting to PHP files in VS Code

Author: loilo

.prettierrc

@@ -35,3 +35,6 @@ overrides:
   - files: 'tests/**/*.php'
     options:
       printWidth: 80
+
+plugins:
+  - '@prettier/plugin-php'

.vscode/settings.json

@@ -7,5 +7,8 @@
 		"titleBar.inactiveBackground": "#f5be1b99",
 		"titleBar.inactiveForeground": "#15202b99"
 	},
-	"peacock.color": "#F5BE1B"
+	"peacock.color": "#F5BE1B",
+	"prettier.documentSelectors": [
+		"**/*.{js,jsx,ts,tsx,vue,html,css,scss,less,json,md,mdx,graphql,yaml,yml,php}"
+	]
 }