Add configurable text encoding for file and folder names

Replace hardcoded Mac Roman encoding globals with a configurable Encoding
field in config.yaml. Servers that exclusively serve modern UTF-8 clients
can now set Encoding: utf8 to disable Mac Roman conversion. The default
remains "macintosh" for backward compatibility.

- Add Encoding field to Config struct (macintosh|utf8)
- Store TextDecoder/TextEncoder on Server, initialized from config
- Add TextDecoder()/TextEncoder() accessors on ClientConn
- Pass decoder/encoder explicitly to ReadPath and GetFileNameList
- Remove package-level txtEncoder/txtDecoder globals
- Add warning log when files are skipped due to encoding errors
- Log and return error replies in HandleGetFileNameList on failure
- Document the new config option in docs/text-encoding.md

0 files changed, 0 insertions, 0 deletions