Use pico inflation for ledger-tool capitalization --enable-inflation (#13215)

* Use pico inflation for ledger-tool capitalization --enable-inflation

* rust fmt

sdk/src/inflation.rs

@@ -65,6 +65,10 @@ impl Inflation {
         }
     }
 
+    pub fn pico() -> Self {
+        Self::new_fixed(0.0001) // 0.01% inflation
+    }
+
     /// inflation rate at year
     pub fn total(&self, year: f64) -> f64 {
         assert!(year >= 0.0);