feat: add fallback for unpluginContext.warn

In the warnDiagnostic function, a fallback for unpluginContext.warn
has been added. If unpluginContext.warn is not available, consola.warn
will be used instead. This change ensures that warnings are always
displayed, even if unpluginContext.warn is not defined.

packages/unplugin-typia/src/core/typia.ts

@@ -3,6 +3,7 @@ import { resolve } from 'pathe';
 import { resolveTSConfig } from 'pkg-types';
 import { transform as typiaTransform } from 'typia/lib/transform.js';
 
+import { consola } from 'consola';
 import type { ResolvedOptions } from './options.ts';
 import type { Data, ID, Source, UnContext } from './types.js';
 import { wrap } from './types.js';
@@ -205,9 +206,10 @@ function warnDiagnostic(
 	unpluginContext: UnContext,
 ) {
 	for (const diagnostic of diagnostics) {
-		unpluginContext.warn(
+		const warn = unpluginContext?.warn ?? consola.warn;
+		warn(
 			transformed.map(e => e.fileName).join(','),
 		);
-		unpluginContext.warn(JSON.stringify(diagnostic.messageText));
+		warn(JSON.stringify(diagnostic.messageText));
 	}
 }