server: replace route.js with route.ts so it works with deno

deno.json

···
 {
   "tasks": {
     "dev": "PORT=8000 deno run --watch --allow-net --allow-env=HOSTNAME,PORT,NODE_ENV src/index.ts",
-    "lexgen": "deno run --allow-env --allow-sys --allow-read=. --allow-write=./src/lexicons --no-prompt @atcute/lex-cli generate -c ./lex.config.js"
+    "lexgen": "deno run --allow-env --allow-sys --allow-read=. --allow-write=./src/lexicons --no-prompt @atcute/lex-cli generate -c ./lex.config.js && cat ./src/lexicons/index.ts | sed \"s/route.js/route.ts/\" > ./src/lexicons/index.ts"
   },
   "imports": {
     "@atcute/identity-resolver": "npm:@atcute/identity-resolver@^1.1.3",

src/lexicons/index.ts

···
-export * as DevAtcitiesRoute from "./types/dev/atcities/route.js";
+export * as DevAtcitiesRoute from "./types/dev/atcities/route.ts";