Add weapon and some other info to perround

In the events per round, it now dispalys the weapon used and headshot and noscope if applicable.
Otherwise also cleaned up other code

common/src/demo_analysis.rs

@@ -74,5 +74,11 @@ pub enum RoundWinReason {
 pub enum RoundEvent {
     BombPlanted,
     BombDefused,
-    Killed { attacker: String, died: String },
+    Killed {
+        attacker: String,
+        died: String,
+        weapon: Option<String>,
+        noscope: bool,
+        headshot: bool,
+    },
 }