refactor(structure): normalize folder names with leading zeros for consistency

- Renamed all folders from format NEx (e.g., 1Ex, 2Ex...) to 0NEx (01Ex, 02Ex, etc.)
- Updated subdirectories and files accordingly
- Removed old main Makefile and tasks (a01.c–a09.c, solve.c, io_status.h), likely obsolete
- Cleaned up deprecated task binaries and configs

2025.03.07/8Ex/array_io.h

@@ -1,11 +0,0 @@
-#ifndef ARRAY_IO_H
-#define ARRAY_IO_H
-
-#include "io_status.h"
-#include "init_f.h"
-
-io_status read_matrix(double *a, int n, int m, const char *name);
-void print_matrix(const double *a, int n, int m, int p);
-void init_matrix(double *a, int n, int m, int k);
-
-#endif