chore: improve types and imports

src/runtime/types/avatar.d.ts

@@ -0,0 +1,10 @@
+export interface Avatar {
+  src: string
+  alt: string
+  text: string
+  size: string
+  rounded: boolean
+  chip: boolean
+  chipVariant: string
+  chipPosition: string
+}

src/runtime/types/command-palette.d.ts

@@ -1,5 +1,6 @@
 import type { Ref, ComputedRef } from 'vue'
 import type { UseFuseOptions } from '@vueuse/integrations/useFuse'
+import type { Avatar } from './avatar'
 
 export interface Command {
   prefix?: string
@@ -7,7 +8,7 @@ export interface Command {
   label: string
   icon?: string
   iconClass?: string
-  avatar?: string
+  avatar?: Partial<Avatar>
   chip?: string
   disabled?: boolean
   shortcuts?: string[]