Remove import cycle in src/plugins/r2

This probably wasn't a problem, but generally it's not great to have
cyclic dependencies. For future reference, this was found with
`npx madge --circular --extensions ts packages/miniflare/src`.

packages/miniflare/src/plugins/r2/gateway.ts

@@ -27,7 +27,7 @@ import {
   NoSuchUpload,
   PreconditionFailed,
 } from "./errors";
-import { R2Object, R2ObjectBody } from "./r2Object";
+import { R2Object, R2ObjectBody, R2Objects } from "./r2Object";
 import {
   MultipartPartRow,
   MultipartUploadRow,
@@ -111,24 +111,6 @@ class DigestingStream<
   }
 }
 
-export interface R2Objects {
-  // An array of objects matching the list request.
-  objects: R2Object[];
-  // If true, indicates there are more results to be retrieved for the current
-  // list request.
-  truncated: boolean;
-  // A token that can be passed to future list calls to resume listing from that
-  // point.
-  // Only present if truncated is true.
-  cursor?: string;
-  // If a delimiter has been specified, contains all prefixes between the
-  // specified prefix and the next occurrence of the delimiter. For example, if
-  // no prefix is provided and the delimiter is "/", "foo/bar/baz" would return
-  // "foo" as a delimited prefix. If "foo/" was passed as a prefix with the same
-  // structure and delimiter, "foo/bar" would be returned as a delimited prefix.
-  delimitedPrefixes: string[];
-}
-
 const validate = new Validator();
 
 function generateVersion() {

packages/miniflare/src/plugins/r2/r2Object.ts

@@ -2,7 +2,6 @@ import { Blob } from "buffer";
 import { ReadableStream, TransformStream } from "stream/web";
 import type { R2StringChecksums } from "@cloudflare/workers-types/experimental";
 import { HEX_REGEXP } from "../../shared";
-import { R2Objects } from "./gateway";
 import { ObjectRow, R2HeadResponse, R2HttpFields, R2Range } from "./schemas";
 
 export interface EncodedMetadata {
@@ -101,3 +100,21 @@ export class R2ObjectBody extends R2Object {
     };
   }
 }
+
+export interface R2Objects {
+  // An array of objects matching the list request.
+  objects: R2Object[];
+  // If true, indicates there are more results to be retrieved for the current
+  // list request.
+  truncated: boolean;
+  // A token that can be passed to future list calls to resume listing from that
+  // point.
+  // Only present if truncated is true.
+  cursor?: string;
+  // If a delimiter has been specified, contains all prefixes between the
+  // specified prefix and the next occurrence of the delimiter. For example, if
+  // no prefix is provided and the delimiter is "/", "foo/bar/baz" would return
+  // "foo" as a delimited prefix. If "foo/" was passed as a prefix with the same
+  // structure and delimiter, "foo/bar" would be returned as a delimited prefix.
+  delimitedPrefixes: string[];
+}

packages/miniflare/src/plugins/r2/router.ts

@@ -10,8 +10,8 @@ import {
   decodePersist,
 } from "../shared";
 import { InternalError, InvalidMetadata } from "./errors";
-import { R2Gateway, R2Objects } from "./gateway";
-import { EncodedMetadata, R2Object, R2ObjectBody } from "./r2Object";
+import { R2Gateway } from "./gateway";
+import { EncodedMetadata, R2Object, R2ObjectBody, R2Objects } from "./r2Object";
 import { R2BindingRequestSchema } from "./schemas";
 
 async function decodeMetadata(req: Request) {