chore: don't gitignore manual types

.gitignore

@@ -1,7 +1,6 @@
 node_modules
 coverage
 dist
-types
 .vscode
 .DS_Store
 .eslintcache

types/bun.ts

@@ -0,0 +1,60 @@
+// Reference: https://bun.sh/docs/api/websockets
+
+export interface BunWSOptions {
+  message: (
+    ws: BunServerWebSocket,
+    message: string | ArrayBuffer | Uint8Array,
+  ) => void;
+  open?: (ws: BunServerWebSocket) => void;
+  close?: (ws: BunServerWebSocket) => void;
+  error?: (ws: BunServerWebSocket, error: Error) => void;
+  drain?: (ws: BunServerWebSocket) => void;
+  perMessageDeflate?:
+    | boolean
+    | {
+        compress?: boolean | BunWSCompressor;
+        decompress?: boolean | BunWSCompressor;
+      };
+}
+
+type BunWSCompressor =
+  | `"disable"`
+  | `"shared"`
+  | `"dedicated"`
+  | `"3KB"`
+  | `"4KB"`
+  | `"8KB"`
+  | `"16KB"`
+  | `"32KB"`
+  | `"64KB"`
+  | `"128KB"`
+  | `"256KB"`;
+
+export interface BunWSServer {
+  pendingWebsockets: number;
+  publish(
+    topic: string,
+    data: string | ArrayBufferView | ArrayBuffer,
+    compress?: boolean,
+  ): number;
+  upgrade(
+    req: Request,
+    options?: {
+      headers?: HeadersInit;
+      data?: any;
+    },
+  ): boolean;
+}
+
+export interface BunServerWebSocket {
+  readonly data: any;
+  readonly readyState: number;
+  readonly remoteAddress: string;
+  send(message: string | ArrayBuffer | Uint8Array, compress?: boolean): number;
+  close(code?: number, reason?: string): void;
+  subscribe(topic: string): void;
+  unsubscribe(topic: string): void;
+  publish(topic: string, message: string | ArrayBuffer | Uint8Array): void;
+  isSubscribed(topic: string): boolean;
+  cork(cb: (ws: BunServerWebSocket) => void): void;
+}