implemented automatic summary generation, and added timestamps in page list

example/ferris@1767468388.md

@@ -0,0 +1,16 @@
+# The Mascot: Ferris
+
+**Ferris** is the unofficial mascot of the Rust community. He is a crab because Rust programmers often call themselves "Rustaceans" (a play on the word crustacean).
+
+### Why a crab?
+- Rustaceans are known for being friendly and helpful.
+- Crabs have hard shells (like Rust's safety guarantees).
+- They have powerful claws (like Rust's powerful type system).
+
+```rust
+fn main() {
+    println!("Hello from Ferris!");
+}
+```
+
+> "The Rust community is one of the most welcoming in the tech world."