feat: implement loading of ability videos

src/routes/cache.ts

@@ -1,5 +1,6 @@
 import express from "express";
 import buildConfig from "@/static/data/buildConfig.json";
+import fs from "fs";
 
 const cacheRouter = express.Router();
 
@@ -15,4 +16,18 @@ cacheRouter.get(/^\/origin\/[a-zA-Z0-9]+\/[0-9]+\/H\.Cache\.bin.*$/, (_req, res)
     res.sendFile(`static/data/H.Cache_${buildConfig.version}.bin`, { root: "./" });
 });
 
+cacheRouter.get(/\.bk2!/, async (req, res) => {
+    const dir = req.path.substr(0, req.path.lastIndexOf("/"));
+    const file = req.path.substr(dir.length + 1);
+
+    // Return file if we have it
+    if (fs.existsSync(`static/data${dir}/${file}`)) {
+        res.send(fs.readFileSync(`static/data${dir}/${file}`, null));
+        return;
+    }
+
+    // 404 if we don't
+    res.status(404).end();
+});
+
 export { cacheRouter };