feat: update copilot instructions to include Svelte 5+ coding standards

Author: ashwin31

.github/copilot-instructions.md

@@ -23,4 +23,5 @@ BottleCRM is a modern CRM application built with:
 ## Important Notes
 - We need to ensure access control is strictly enforced based on user roles.
 - No record should be accessible unless the user or the org has the appropriate permissions.
-- When implementing forms in sveltekit A form label must be associated with a control
+- When implementing forms in sveltekit A form label must be associated with a control
+- svelte 5+ style coding standards should be followed