Improve source command feedback

Enhance the "source" command by providing clearer feedback to users.
Now, if no source file is specified, the message explicitly suggests
using "source <file>" for better clarity.

Co-authored-by: JimmyChongz <[email protected]>
Change-Id: Icc194a5773860d1923dd274ebf471ba62a397370

Author: EricccTaiwan

console.c

@@ -355,7 +355,7 @@ static bool do_option(int argc, char *argv[])
 static bool do_source(int argc, char *argv[])
 {
     if (argc < 2) {
-        report(1, "No source file given");
+        report(1, "No source file given. Use 'source <file>'.");
         return false;
     }