feat(registry): enhance registry handling with optional password and new test functionality

- Updated the AddRegistrySchema to make the password field optional when editing an existing registry.
- Introduced a new mutation, testRegistryById, to validate registry credentials using existing data.
- Improved form handling to conditionally require the password based on the editing state.
- Enhanced user feedback for registry testing with clearer error messages and instructions.

packages/server/src/db/schema/registry.ts

@@ -80,6 +80,14 @@ export const apiTestRegistry = createSchema.pick({}).extend({
 	serverId: z.string().optional(),
 });
 
+export const apiTestRegistryById = createSchema
+	.pick({
+		registryId: true,
+	})
+	.extend({
+		serverId: z.string().optional(),
+	});
+
 export const apiRemoveRegistry = createSchema
 	.pick({
 		registryId: true,