feat: add generateChangelog function (#73)

Author: sapphi-red

package.json

@@ -26,6 +26,8 @@
     "release": "tnode scripts/release.ts"
   },
   "dependencies": {
+    "conventional-changelog": "^7.1.0",
+    "conventional-changelog-conventionalcommits": "^9.0.0",
     "execa": "^8.0.1",
     "mri": "^1.2.0",
     "picocolors": "^1.1.1",