feat: enhance compiler

- Add comments and test for it
- Add semicolon as required end of some expressions
- Add new arguments parser
- Add multi-file compilation
- Add colors in output

include/compiler/fzl_reader.h

@@ -2,6 +2,7 @@
 #define FZL_READER_H
 
 #include <compiler/fzl_token.h>
+#include <compiler/utils/fzl_linked.h>
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -19,16 +20,16 @@ typedef struct
   fzl_reader_ll_t *first;
   fzl_reader_ll_t *last;
 
+  fzl_linked_t *linked;
+
   char *source;
   size_t size;
 
   size_t position;
-  size_t line_start;
-  size_t line_n;
 } fzl_reader_t;
 
 // Allocate new reader
-fzl_reader_t *fzl_mkreader(char *source);
+fzl_reader_t *fzl_mkreader(fzl_linked_t *linked);
 
 // Read source file
 int fzl_read(fzl_reader_t *reader);