Moved tests + Added more tests + Added memory testing to actions

tests/ev_str/stack_get_space.c

@@ -0,0 +1,12 @@
+#define EV_STR_IMPLEMENTATION
+#include "ev_str.h"
+
+#include <assert.h>
+
+int main(void)
+{
+  evstring stack_str = evstr("abc");
+  assert(evstring_getSpace(stack_str) == 0);
+
+  return 0;
+}