chore: add custom-property config option alias

Author: vnphanquang

.changeset/clean-wolves-occur.md

@@ -0,0 +1,6 @@
+---
+'phosphor-icons-tailwindcss': patch
+---
+
+allow passing `custom-property` option (alias to `customProperty`) to better match CSS naming
+convention (helpful to avoid auto-format when used with Tailwind 4 `@plugin` syntax)

src/plugin.d.ts

@@ -12,6 +12,8 @@ export interface Options {
 	 * CSS custom property for icon URL.
 	 * Default to `--ph-url`
 	 */
+	'custom-property': string;
+	/** alias for 'custom-property' option */
 	customProperty: string;
 }
 

src/plugin.js

@@ -8,8 +8,9 @@ const ICON_SET = /** @type {Set<string>} */ (new Set(icons.map((i) => i.name)));
 
 export default createPlugin.withOptions(
 	/** @param {Partial<import('./plugin').Options>} options */
-	function (options) {
-		const { prefix = 'ph', customProperty = '--ph-url' } = options ?? {};
+	function (options = {}) {
+		const prefix = options.prefix ?? 'ph';
+		const customProperty = options['custom-property'] ?? options['customProperty'] ?? '--ph-url';
 
 		return function (api) {
 			api.addComponents({