Use a proper tokenizer for GPT-4o

package.json

@@ -2,7 +2,6 @@
     "dependencies": {
         "@agnai/sentencepiece-js": "^1.1.1",
         "@agnai/web-tokenizers": "^0.1.3",
-        "@dqbd/tiktoken": "^1.0.13",
         "@zeldafan0225/ai_horde": "^4.0.1",
         "archiver": "^7.0.1",
         "bing-translate-api": "^2.9.1",
@@ -36,6 +35,7 @@
         "sanitize-filename": "^1.6.3",
         "sillytavern-transformers": "^2.14.6",
         "simple-git": "^3.19.1",
+        "tiktoken": "^1.0.15",
         "vectra": "^0.2.2",
         "wavefile": "^11.0.0",
         "write-file-atomic": "^5.0.1",