feat: markdown -> html and then display in editor

package.json

@@ -5,6 +5,7 @@
   "private": true,
   "type": "module",
   "scripts": {
+    "uncache": "rm -f node_modules/.cache/assets",
     "build": "rm -f node_modules/.cache/assets && vite build && tsc",
     "dev": "vite",
     "lint": "eslint src --cache --fix --max-warnings 0",
@@ -23,6 +24,7 @@
     "@types/node": "18.19.6",
     "@types/react": "18.2.47",
     "@types/react-dom": "18.2.18",
+    "@types/showdown": "^2.0.6",
     "@typescript-eslint/eslint-plugin": "6.18.1",
     "@typescript-eslint/parser": "6.18.1",
     "@vitejs/plugin-react-swc": "3.5.0",
@@ -36,6 +38,7 @@
     "prettier": "3.1.1",
     "prettier-plugin-tailwindcss": "0.5.11",
     "sass": "1.70.0",
+    "showdown": "^2.1.0",
     "tailwindcss": "3.4.1",
     "typescript": "5.3.3",
     "vite": "5.0.12",