Handle CRLF line endings in CIF parsing

Addresses #546 (comment)

PiperOrigin-RevId: 827414127
Change-Id: I355409bf40d2869dd5fec638a7fe626677535d19

Author: Augustin-Zidek

src/alphafold3/parsers/cpp/cif_dict_lib.cc

@@ -116,7 +116,7 @@ absl::StatusOr<std::vector<absl::string_view>> TokenizeInternal(
   tokens.reserve(lines.size() * 21);
   int line_num = 0;
   while (line_num < lines.size()) {
-    auto line = lines[line_num];
+    auto line = absl::StripSuffix(lines[line_num], "\r");
     line_num++;
 
     if (line.empty() || line[0] == '#') {