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

src/compiler/fzl_token.c

@@ -4,7 +4,7 @@
 #include <string.h>
 
 fzl_token_t *fzl_mktoken(const fzl_toktype_t type, size_t line, size_t col,
-                         void *value, size_t value_len)
+                         void *value, size_t value_len, char *filename)
 {
   char *valholder = malloc(value_len + 1);
   memcpy(valholder, value, value_len);
@@ -17,6 +17,7 @@ fzl_token_t *fzl_mktoken(const fzl_toktype_t type, size_t line, size_t col,
   token->store_value = value_len > 0;
   token->value       = valholder;
   token->value_sz    = value_len;
+  token->filename    = filename;
 
   return token;
 }