chore(cleanup): replace legacy Matvei project with updated Linux-based version

- Removed obsolete Matvei source files (tasks 01–04, array/matrix/io_status
  modules, Makefile)
- Introduced new Linux-compatible structure in Linux/Matvei
- Updated build logic via new Makefile
- Adjusted .gitignore to exclude new artifacts

2025.03.21/dist/Matvei/comparison.c

@@ -0,0 +1,8 @@
+#include <math.h>
+#include "comparison.h"
+
+int equal(double a, double b)
+  {
+  if (fabs(a - b) <= EPS * fmax(fabs(a), fabs(b))) return 1;
+  return 0;
+  }