add ical generator

package-lock.json

@@ -16,6 +16,7 @@
         "@fortawesome/fontawesome-free": "^6.6.0",
         "eleventy-plugin-gen-favicons": "^1.1.3",
         "eleventy-plugin-icons": "^4.5.1",
+        "ical-generator": "^8.0.0",
         "js-yaml": "^4.1.0",
         "markdown-it": "^14.1.0",
         "svg-text-to-path": "^2.0.3"
@@ -2351,6 +2352,58 @@
         "node": ">= 6"
       }
     },
+    "node_modules/ical-generator": {
+      "version": "8.0.0",
+      "resolved": "https://registry.npmjs.org/ical-generator/-/ical-generator-8.0.0.tgz",
+      "integrity": "sha512-CvVKK3JJrKop6z7i7/NS69FjYdR6ux1LswIeiZ3yaicX7ocMFLQI475JhQabCT7koUkaCVFNVxLaYaxtdPgwww==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "uuid-random": "^1.3.2"
+      },
+      "engines": {
+        "node": "18 || 20 || >=22.0.0"
+      },
+      "peerDependencies": {
+        "@touch4it/ical-timezones": ">=1.6.0",
+        "@types/luxon": ">= 1.26.0",
+        "@types/mocha": ">= 8.2.1",
+        "dayjs": ">= 1.10.0",
+        "luxon": ">= 1.26.0",
+        "moment": ">= 2.29.0",
+        "moment-timezone": ">= 0.5.33",
+        "rrule": ">= 2.6.8"
+      },
+      "peerDependenciesMeta": {
+        "@touch4it/ical-timezones": {
+          "optional": true
+        },
+        "@types/luxon": {
+          "optional": true
+        },
+        "@types/mocha": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "dayjs": {
+          "optional": true
+        },
+        "luxon": {
+          "optional": true
+        },
+        "moment": {
+          "optional": true
+        },
+        "moment-timezone": {
+          "optional": true
+        },
+        "rrule": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/iconv-lite": {
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
@@ -4224,6 +4277,13 @@
         "requires-port": "^1.0.0"
       }
     },
+    "node_modules/uuid-random": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/uuid-random/-/uuid-random-1.3.2.tgz",
+      "integrity": "sha512-UOzej0Le/UgkbWEO8flm+0y+G+ljUon1QWTEZOq1rnMAsxo2+SckbiZdKzAHHlVh6gJqI1TjC/xwgR50MuCrBQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/void-elements": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",