[ref] replace pako to fflate

package.json

@@ -26,6 +26,7 @@
     "dompurify": "^3.0.1",
     "exifr": "^7.1.3",
     "express": "^4.18.2",
+    "fflate": "^0.8.0",
     "gpt-3-encoder": "^1.1.4",
     "gpt3-tokenizer": "^1.1.5",
     "isomorphic-dompurify": "^1.2.0",
@@ -35,7 +36,6 @@
     "mobile-drag-drop": "3.0.0-rc.0",
     "msgpackr": "^1.9.5",
     "node-html-parser": "^6.1.5",
-    "pako": "^2.1.0",
     "png-chunk-text": "^1.0.0",
     "png-chunks-encode": "^1.0.0",
     "png-chunks-extract": "^1.0.0",
@@ -58,7 +58,6 @@
     "@types/lodash.clonedeep": "^4.5.7",
     "@types/lodash.isequal": "^4.5.6",
     "@types/node": "^18.7.10",
-    "@types/pako": "^2.0.0",
     "@types/pngjs": "^6.0.1",
     "@types/showdown": "^2.0.0",
     "@types/uuid": "^9.0.1",