fix: improve error message and clean up string accumulation

Co-authored-by: Strift <5786750+Strift@users.noreply.github.com>

Author: Copilot

packages/instant-meilisearch/src/client/instant-meilisearch-client.ts

@@ -163,7 +163,7 @@ export function instantMeiliSearch(
           return instantSearchResponse
         } catch (e: any) {
           console.error(e)
-          throw new Error(e, { cause: e })
+          throw new Error(e?.message ?? String(e), { cause: e })
         }
       },
       searchForFacetValues: async function (

packages/instant-meilisearch/src/utils/string.ts

@@ -12,6 +12,6 @@ export function isString(str: any): boolean {
  */
 export function stringifyArray(arr: any[]): string {
   return arr.reduce((acc: string, curr: any) => {
-    return (acc + JSON.stringify(curr))
+    return acc + JSON.stringify(curr)
   }, '')
 }