Improve log command feedback

Enhance the "log" command by providing clearer feedback to users.
Now, if no log file is specified, the message explicitly suggests
using "log <file>" for better clarity. Additionally, a message is
printed when logging is enabled, improving user awareness.

Co-authored-by: charliechiou <charlie910417@gmail.com>
Change-Id: I359cb621cf584f149c96226bb183403174880cd9

Author: EricccTaiwan

console.c

@@ -370,14 +370,15 @@ static bool do_source(int argc, char *argv[])
 static bool do_log(int argc, char *argv[])
 {
     if (argc < 2) {
-        report(1, "No log file given");
+        report(1, "No log file given. Use 'log <file>'.");
         return false;
     }
 
     bool result = set_logfile(argv[1]);
     if (!result)
         report(1, "Couldn't open log file '%s'", argv[1]);
 
+    printf("Logging enabled: %s\n", argv[1]);
     return result;
 }