add some missing Game api

Author: XavierCHN

packages/panorama-types/types/api.d.ts

@@ -1443,6 +1443,12 @@ interface CScriptBindingPR_Game {
 
     IsInBanPhase(): boolean;
 
+    GetConvarBool(name: string): boolean;
+    
+    GetConvarInt(name: string): number;
+
+    GetConvarFloat(name: string): number;
+
     /**
      * Return the team id of the winning team.
      */