perf: use lzma-wasm for SWF decompression and drop vite

Replace the pure-JS lzma decoder with lzma-wasm (Rust/WASM, base64-inlined,
zero-alloc decompress), giving an order-of-magnitude speedup on furni
imports. Remove the obsolete lzma type shim and the redundant top-level
vite dev dependency, which nothing imports directly.

next.config.ts

@@ -32,7 +32,7 @@ const nextConfig: NextConfig = {
 	reactStrictMode: true,
 	compress: true,
 	productionBrowserSourceMaps: false,
-	serverExternalPackages: ["lzma", "sharp", "pino", "pino-pretty"],
+	serverExternalPackages: ["lzma-wasm", "sharp", "pino", "pino-pretty"],
 
 	async redirects() {
 		return [