Added paragraph, image and link detection to porcess_md function. Refactored code a bit

include/file_op/file.h

@@ -7,6 +7,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
+#include <stdio.h>
 
 struct file_s
 {
@@ -18,5 +19,6 @@ struct file_s
 char *gen_file_path(char *path);
 int send_file(int cli_fd, struct file_s *file);
 struct file_s *get_file_info(char *file_path);
+size_t get_file_size(FILE *file);
 
 #endif