Warn and continue when local icon cannot be loaded (#184)

* fix(#183): warn and continue when local icon cannot be loaded

* chore: add changeset

Author: natemoo-re

.changeset/heavy-insects-yawn.md

@@ -0,0 +1,5 @@
+---
+"astro-icon": patch
+---
+
+Improves handling of invalid local icons, which previously caused all local icons to silently fail.

packages/core/src/loaders/loadLocalCollection.ts

@@ -17,6 +17,7 @@ export default async function createLocalCollection(
     prefix: "local",
     keepTitles: true,
     includeSubDirs: true,
+    ignoreImportErrors: 'warn',
     keyword: (file) => file.subdir + file.file,
   });