Support for dynamic page loading for Multi-WACZs (#399)

Support querying pages dynamically via pages endpoint:
- If loaded pages < total pages, load additional pages via /pages
endpoint if canQueryPages is set to true on item
- If query provided, do `/pages?search=...` to search for pages. Use
pagination of 25 pages for now.

WACZ hash:
- if provided, store waczhash per page, and use for thumbnail, favicon
and top-level replay loading.

Embed: better support for force reloading, call delete with reload
directly in embed

Depends on webrecorder/wabac.js#220

src/types.ts

@@ -11,9 +11,12 @@ export type URLResource = {
   size: number;
   favIconUrl: string;
   text?: string;
+  waczhash?: string;
 };
 
-export type Page = URLResource;
+export type Page = URLResource & {
+  isSeed?: boolean;
+};
 
 export type ItemType = {
   filename?: string;
@@ -43,12 +46,13 @@ export type ItemType = {
     software?: string;
   };
   onDemand?: boolean;
-  pages: URLResource[];
+  pages: Page[];
   curatedPages: (URLResource & { list: string })[];
   lists: URLResource[];
   ctime?: string;
   totalSize?: unknown;
   size?: number | string;
+  canQueryPages?: boolean;
 };
 
 export type FavIconEventDetail = {