manual??? and refactoring

manual.c

@@ -0,0 +1,33 @@
+//
+// Created by snapshot112 on 10/17/25.
+//
+
+#include "manual.h"
+
+#include <ncurses.h>
+
+#include "rooster.h"
+
+void manual(const coordinate display_location) {
+    erase();
+    FILE *fp = fopen("assets/handleiding.txt", "r");
+    if (fp == NULL) {
+        return;
+    }
+
+    rooster *grid = grid_from_file(fp);
+    if (grid == NULL) {
+        mvaddstr(display_location.y, display_location.x, "Error loading grid");
+        return;
+    }
+
+    fclose(fp);
+    show_grid_on_offset(grid, display_location.x, display_location.y);
+
+    rooster_klaar(grid);
+
+    int ch = getch();
+    while (ch != KEY_ESCAPE && ch != KEY_BACKSPACE && ch != ' ') {
+        ch = getch();
+    }
+}