implement createICS function in index.js

package-lock.json

@@ -10,6 +10,7 @@
       "license": "ISC",
       "devDependencies": {
         "html-entities": "^2.4.0",
+        "ics": "^3.4.0",
         "node-html-parser": "^6.1.9"
       }
     },
@@ -139,6 +140,34 @@
         }
       ]
     },
+    "node_modules/ics": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/ics/-/ics-3.4.0.tgz",
+      "integrity": "sha512-ewKO7nF5BKhVKas3XmjB1siXdhJ7OvojY+HmD1ik/lozuzcZdy+Wt6IbB2San2gvHZAMUZhTa4UQyCE1I8e+sw==",
+      "dev": true,
+      "dependencies": {
+        "nanoid": "^3.1.23",
+        "yup": "^1.2.0"
+      }
+    },
+    "node_modules/nanoid": {
+      "version": "3.3.6",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.6.tgz",
+      "integrity": "sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/ai"
+        }
+      ],
+      "bin": {
+        "nanoid": "bin/nanoid.cjs"
+      },
+      "engines": {
+        "node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
+      }
+    },
     "node_modules/node-html-parser": {
       "version": "6.1.9",
       "resolved": "https://registry.npmjs.org/node-html-parser/-/node-html-parser-6.1.9.tgz",
@@ -160,6 +189,48 @@
       "funding": {
         "url": "https://github.com/fb55/nth-check?sponsor=1"
       }
+    },
+    "node_modules/property-expr": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/property-expr/-/property-expr-2.0.5.tgz",
+      "integrity": "sha512-IJUkICM5dP5znhCckHSv30Q4b5/JA5enCtkRHYaOVOAocnH/1BQEYTC5NMfT3AVl/iXKdr3aqQbQn9DxyWknwA==",
+      "dev": true
+    },
+    "node_modules/tiny-case": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/tiny-case/-/tiny-case-1.0.3.tgz",
+      "integrity": "sha512-Eet/eeMhkO6TX8mnUteS9zgPbUMQa4I6Kkp5ORiBD5476/m+PIRiumP5tmh5ioJpH7k51Kehawy2UDfsnxxY8Q==",
+      "dev": true
+    },
+    "node_modules/toposort": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/toposort/-/toposort-2.0.2.tgz",
+      "integrity": "sha512-0a5EOkAUp8D4moMi2W8ZF8jcga7BgZd91O/yabJCFY8az+XSzeGyTKs0Aoo897iV1Nj6guFq8orWDS96z91oGg==",
+      "dev": true
+    },
+    "node_modules/type-fest": {
+      "version": "2.19.0",
+      "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-2.19.0.tgz",
+      "integrity": "sha512-RAH822pAdBgcNMAfWnCBU3CFZcfZ/i1eZjwFU/dsLKumyuuP3niueg2UAukXYF0E2AAoc82ZSSf9J0WQBinzHA==",
+      "dev": true,
+      "engines": {
+        "node": ">=12.20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/yup": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/yup/-/yup-1.2.0.tgz",
+      "integrity": "sha512-PPqYKSAXjpRCgLgLKVGPA33v5c/WgEx3wi6NFjIiegz90zSwyMpvTFp/uGcVnnbx6to28pgnzp/q8ih3QRjLMQ==",
+      "dev": true,
+      "dependencies": {
+        "property-expr": "^2.0.5",
+        "tiny-case": "^1.0.3",
+        "toposort": "^2.0.2",
+        "type-fest": "^2.19.0"
+      }
     }
   }
 }