Implement encoding and decoding for Windows-invalid characters in file names

- Added `encode_path_name` and `decode_path_name` functions to handle encoding and decoding of invalid characters.
- Updated `SyncbackRules` to include an option for encoding Windows-invalid characters during syncback.
- Modified `name_for_inst` to conditionally encode invalid characters based on the new option.
- Adjusted `ServeSession` and `InstanceContext` to support the new encoding feature.
- Updated tests and snapshots to reflect changes in encoding behavior.

src/lib.rs

@@ -14,6 +14,7 @@ mod json;
 mod lua_ast;
 mod message_queue;
 mod multimap;
+pub mod path_encoding;
 mod path_serializer;
 mod project;
 mod resolution;