Remove legacy IPC usage

- From extension installation state store

Signed-off-by: Sebastian Malton <sebastian@malton.name>

packages/core/src/common/utils/channel/message-to-channel-injection-token.ts

@@ -7,7 +7,7 @@ import type { MessageChannel } from "./message-channel-listener-injection-token"
 
 export interface SendMessageToChannel {
   (channel: MessageChannel<void>): void;
-  <Message>(channel: MessageChannel<Message>, message: Message): void;
+  <Channel extends MessageChannel<unknown>>(channel: Channel, message: Channel extends MessageChannel<infer Message> ? Message : never): void;
 }
 
 export type MessageChannelSender<Channel> = Channel extends MessageChannel<void | undefined>

packages/core/src/common/utils/iter.ts

@@ -14,6 +14,7 @@ interface Iterator<T> extends Iterable<T> {
   flatMap<U>(fn: (val: T) => U[]): Iterator<U>;
   concat(src2: IterableIterator<T>): Iterator<T>;
   join(sep?: string): string;
+  count(): number;
 }
 
 export function chain<T>(src: IterableIterator<T>): Iterator<T> {
@@ -26,6 +27,7 @@ export function chain<T>(src: IterableIterator<T>): Iterator<T> {
     join: (sep) => join(src, sep),
     collect: (fn) => fn(src),
     concat: (src2) => chain(concat(src, src2)),
+    count: () => count(src),
     [Symbol.iterator]: () => src,
   };
 }
@@ -246,3 +248,14 @@ export function* concat<T>(...sources: IterableIterator<T>[]): IterableIterator<
     }
   }
 }
+
+export function count(src: Iterable<unknown>): number {
+  let i = 0;
+
+  for (const x of src) {
+    void x;
+    i += 1;
+  }
+
+  return i;
+}