improvement(settings): add searchable member selector in integrations and secrets (#3721)

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/settings/components/credentials/credentials-manager.tsx

@@ -1274,6 +1274,8 @@ export function CredentialsManager() {
                           selectedValue={memberUserId}
                           onChange={setMemberUserId}
                           placeholder='Add member...'
+                          searchable
+                          searchPlaceholder='Search members...'
                           size='sm'
                         />
                         <Combobox

apps/sim/app/workspace/[workspaceId]/settings/components/integrations/integrations-manager.tsx

@@ -999,6 +999,8 @@ export function IntegrationsManager() {
                           selectedValue={memberUserId}
                           onChange={setMemberUserId}
                           placeholder='Add member...'
+                          searchable
+                          searchPlaceholder='Search members...'
                           size='sm'
                         />
                         <Combobox