refactor(interceptors): update LOGGER handling

packages/interceptors/src/api.ts

@@ -1,6 +1,5 @@
 import type { ReadonlyAtom } from "@thi.ng/atom";
-import type { ILogger } from "@thi.ng/logger";
-import { NULL_LOGGER } from "@thi.ng/logger/null";
+import { ROOT } from "@thi.ng/logger/root";
 
 export type InterceptorFn = (
 	state: any,
@@ -84,6 +83,7 @@ export interface InterceptorContext {
 	[id: string]: any;
 }
 
-export let LOGGER = NULL_LOGGER;
-
-export const setLogger = (logger: ILogger) => (LOGGER = logger);
+/**
+ * See [thi.ng/logger](https://docs.thi.ng/umbrella/logger/) for usage.
+ */
+export const LOGGER = ROOT.childLogger("icep");