fix: show clear error when creating or updating organization site name to an existing one (#793)

* fixed error of not showing the org name API response error

* Fixed the error also for organization settings page

* modified

* Keep field-specific mapping in OrgApi

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/dashboard/src/routes/(auth)/onboarding/+page.svelte

@@ -102,6 +102,7 @@
                 suffix=".classroomio.com"
                 oninput={() => {
                   isSiteNameTouched = true;
+                  onboardingApi.errors.siteName = '';
                 }}
               />
               {#if onboardingApi.errors.siteName}