feat: add back react colour picker

package.json

@@ -60,7 +60,6 @@
     "@codemirror/search": "^6.5.10",
     "@codemirror/state": "^6.5.2",
     "@codemirror/view": "^6.36.4",
-    "@jaames/iro": "^5.5.2",
     "@sveltejs/vite-plugin-svelte": "^5.0.3",
     "@tailwindcss/forms": "^0.5.9",
     "@tailwindcss/vite": "^4.0.12",
@@ -86,6 +85,9 @@
     "lodash": "^4.17.21",
     "million": "^3.1.11",
     "motion": "^12.4.12",
+    "react": "17",
+    "react-best-gradient-color-picker": "3.0.11",
+    "react-dom": "17",
     "rss-parser": "^3.13.0",
     "sortablejs": "^1.15.6",
     "svelte": "^5.22.6",