Add listReposByCollection to SyncRequestClient

src/Client/Requests/Atproto/SyncRequestClient.php

···
 use SocialDept\AtpClient\Client\Requests\Request;
 use SocialDept\AtpClient\Data\Responses\Atproto\Sync\GetRepoStatusResponse;
 use SocialDept\AtpClient\Data\Responses\Atproto\Sync\ListBlobsResponse;
+use SocialDept\AtpClient\Data\Responses\Atproto\Sync\ListReposByCollectionResponse;
 use SocialDept\AtpClient\Data\Responses\Atproto\Sync\ListReposResponse;
 use SocialDept\AtpClient\Enums\Nsid\AtprotoSync;
 use SocialDept\AtpClient\Enums\Scope;
···
         );
 
         return ListReposResponse::fromArray($response->json());
+    }
+
+    /**
+     * Enumerates all the DIDs with records in a specific collection
+     *
+     * @requires atproto (rpc:com.atproto.sync.listReposByCollection)
+     *
+     * @see https://docs.bsky.app/docs/api/com-atproto-sync-list-repos-by-collection
+     */
+    #[RequiresScope(Scope::Atproto, granular: 'rpc:com.atproto.sync.listReposByCollection')]
+    public function listReposByCollection(
+        string|BackedEnum $collection,
+        int $limit = 500,
+        ?string $cursor = null
+    ): ListReposByCollectionResponse {
+        $collection = $collection instanceof BackedEnum ? $collection->value : $collection;
+
+        $response = $this->atp->client->get(
+            endpoint: AtprotoSync::ListReposByCollection,
+            params: compact('collection', 'limit', 'cursor')
+        );
+
+        return ListReposByCollectionResponse::fromArray($response->json());
     }
 
     /**

src/Data/Responses/Atproto/Sync/ListReposByCollectionResponse.php

···
+<?php
+
+namespace SocialDept\AtpClient\Data\Responses\Atproto\Sync;
+
+use Illuminate\Contracts\Support\Arrayable;
+use Illuminate\Support\Collection;
+
+/**
+ * @implements Arrayable<string, mixed>
+ */
+class ListReposByCollectionResponse implements Arrayable
+{
+    /**
+     * @param  Collection<int, array{did: string, rev: string}>  $repos
+     */
+    public function __construct(
+        public readonly Collection $repos,
+        public readonly ?string $cursor = null,
+    ) {}
+
+    public static function fromArray(array $data): self
+    {
+        return new self(
+            repos: collect($data['repos'] ?? []),
+            cursor: $data['cursor'] ?? null,
+        );
+    }
+
+    public function toArray(): array
+    {
+        return [
+            'repos' => $this->repos->all(),
+            'cursor' => $this->cursor,
+        ];
+    }
+}

src/Enums/Nsid/AtprotoSync.php

···
     case GetBlob = 'com.atproto.sync.getBlob';
     case GetRepo = 'com.atproto.sync.getRepo';
     case ListRepos = 'com.atproto.sync.listRepos';
+    case ListReposByCollection = 'com.atproto.sync.listReposByCollection';
     case GetLatestCommit = 'com.atproto.sync.getLatestCommit';
     case GetRecord = 'com.atproto.sync.getRecord';
     case ListBlobs = 'com.atproto.sync.listBlobs';