computer: add tx annualized volume + tx velocity + rename _in_usd/_in_btc to _usd/_btc

crates/brk_structs/src/structs/bitcoin.rs

@@ -134,3 +134,8 @@ impl CheckedSub<usize> for Bitcoin {
         Some(Self(self.0 - rhs as f64))
     }
 }
+impl CheckedSub<Bitcoin> for Bitcoin {
+    fn checked_sub(self, rhs: Bitcoin) -> Option<Self> {
+        Some(Self(self.0 - rhs.0))
+    }
+}

crates/brk_structs/src/structs/stored_f64.rs

@@ -175,3 +175,10 @@ impl Sum for StoredF64 {
         Self(iter.map(|v| v.0).sum::<f64>())
     }
 }
+
+impl Div<Bitcoin> for StoredF64 {
+    type Output = Self;
+    fn div(self, rhs: Bitcoin) -> Self::Output {
+        Self(self.0 / f64::from(rhs))
+    }
+}