fix: module syntax — changed src_bux/*.bux from module X; to module X { ... }

src_bux/main.bux

@@ -1,5 +1,5 @@
 // main.bux — Entry point for the Bux self-hosting compiler
-module Main;
+module Main {
 
 // Forward declaration from Cli module
 func Cli_Run(args: *String, argCount: int) -> int;
@@ -9,4 +9,4 @@ func Main() -> int {
     // For now, just show version info
     var emptyArgs: *String = null as *String;
     return Cli_Run(emptyArgs, 0);
-}
+}