add: date cmd to shell

src/shell/date.c

@@ -0,0 +1,22 @@
+#include "kprintf.h"
+#include "rtc.h"
+
+void date()
+{
+    static const char *months[12] = {
+        "January",
+        "February",
+        "March",
+        "April",
+        "May",
+        "June",
+        "July",
+        "August",
+        "September",
+        "October",
+        "November",
+        "December" };
+    struct rtc_date date = get_date();
+
+    kprintf(0, "%s. %d %s. %d %d:%d:%d\n", "mer", date.day, months[date.month], date.year, date.hour, date.minute, date.second);
+}

src/shell/exec.c

@@ -39,6 +39,8 @@ static CMD_TOK find_command(char *line)
 		command = COLOR;
 	else if (!strcmp(line, "merdella"))
 		command = MERDELLA;
+	else if (!strcmp(line, "date"))
+		command = DATE;
 	else
 		kprintf(0, "invalid command: %s\n", line);
 	if (uwu)
@@ -120,6 +122,9 @@ void shell_init(void)
 				    "by Targon (/)\n");
 			break;
 		}
+		case DATE:
+			date();
+			break;
 		case ERROR:
 			break;
 		default: