new command 'log show' to dump out last log messages. useful for serial when you've missed the startup messages

src/console.cpp

@@ -51,6 +51,12 @@ static inline EMSESP & to_app(Shell & shell) {
 
 static void console_log_level(Shell & shell, const std::vector<std::string> & arguments) {
     if (!arguments.empty()) {
+        // special command called show which dumps out the contents of the web log buffer
+        if (arguments[0] == "show") {
+            EMSESP::webLogService.show(shell);
+            return;
+        }
+
         uuid::log::Level level;
 
         if (uuid::log::parse_level_lowercase(arguments[0], level)) {