- add `r_fs_file_copy_abs_path` to get the absolute path of a RFSFile, centralizing edge case handling
- use that in `fs_io_read`
- add missing `free (file->path)` in RFSFile destructor
- fix `handlePipes` for fs shell `cat` use case
* Fix wrong logic in visual_search
When the string to be searched is wrapped in " ", you want to remove the
first and last quotes and look only for the internal string.
* Increase size to prevent string truncation (and fix compiler warning)
* Fix "destination unchanged after copying no bytes" warning
* Move msp430_register_names where it belongs to
* Fix Wstringop-truncation warning
