feat: add comment component and comment configuration (#37)

* ✨ feat: Add comment component and comment configuration

* chore: rebuild pnpm-lock

---------

Co-authored-by: saicaca <zephyird@gmail.com>

package.json

@@ -27,6 +27,7 @@
     "colorjs.io": "^0.5.0",
     "hastscript": "^9.0.0",
     "markdown-it": "^14.1.0",
+    "giscus": "^1.5.0",
     "mdast-util-to-string": "^4.0.0",
     "overlayscrollbars": "^2.8.3",
     "pagefind": "^1.1.0",
@@ -66,4 +67,4 @@
       "sharp": "^0.33.0"
     }
   }
-}
+}