Start of rewrite

Based on lockpick_rcm 1.9.0

source/fs/readers/folderReader.c

@@ -0,0 +1,37 @@
+#include "folderReader.h"
+#include <libs/fatfs/ff.h>
+#include "../../utils/utils.h"
+
+Vector_t /* of type FSEntry_t */ ReadFolder(char *path){
+    Vector_t out = newVec(sizeof(FSEntry_t), 16); // we may want to prealloc with the same size as the folder
+    DIR dir;
+    FILINFO fno;
+    int res;
+
+    if ((res = f_opendir(&dir, path))){
+        // Err!
+        return out;
+    }
+
+    while (!f_readdir(&dir, &fno) && fno.fname[0]) {
+        FSEntry_t newEntry = {.isDir = (fno.fattrib & AM_DIR) ? 1 : 0, .name = CpyStr(fno.fname)};
+        if (!newEntry.isDir){
+            u64 total = fno.fsize;
+            u8 type = 0;
+            while (total > 1024){
+                total /= 1024;
+                type++;
+            }
+
+            if (type > 3)
+                type = 3;
+
+            newEntry.showSize = 1;
+            newEntry.size = total;
+            newEntry.sizeDef = type;
+        }
+        vecAddElem(&out, newEntry);
+    }
+
+    return out;
+}