feat: invoker command type

packages/danaus/src/web/primitives/button.tsx

···
 import { cva, type VariantProps } from 'cva';
 import type { Child } from 'hono/jsx';
 
+import type { InvokerCommand } from './utils/types.ts';
+
 const root = cva({
 	base: [
 		'inline-flex appearance-none items-center justify-center gap-2 overflow-hidden align-middle select-none',
···
 	/** invoker command target element id */
 	commandfor?: string;
 	/** invoker command action */
-	command?: string;
+	command?: InvokerCommand;
 	class?: string;
 	children?: Child;
 }

packages/danaus/src/web/primitives/menu-item.tsx

···
 import { cva } from 'cva';
 import type { Child } from 'hono/jsx';
 
+import type { InvokerCommand } from './utils/types.ts';
+
 const root = cva({
 	base: [
 		'flex items-center gap-1 rounded-md px-2 py-1.5 text-left select-none',
···
 	/** invoker command target element id */
 	commandfor?: string;
 	/** invoker command action */
-	command?: string;
+	command?: InvokerCommand;
 	class?: string;
 	children?: Child;
 }

packages/danaus/src/web/primitives/utils/types.ts

···
+/**
+ * invoker command actions
+ */
+export type InvokerCommand =
+	// dialog commands
+	| 'show-modal'
+	| 'close'
+	// popover commands
+	| 'toggle-popover'
+	| 'show-popover'
+	| 'hide-popover'
+	// custom commands (must start with --)
+	| `--${string}`;