fix(cmdk): sse.js type definition in ui package

packages/ui/src/types/sse.d.ts

@@ -0,0 +1,12 @@
+declare module 'sse.js' {
+  export type SSEOptions = EventSourceInit & {
+    headers?: Record<string, string>
+    payload?: string
+    method?: string
+  }
+
+  export class SSE extends EventSource {
+    constructor(url: string | URL, sseOptions?: SSEOptions)
+    stream(): void
+  }
+}