Improper handling of windows file names

[markokocic]

Just noticed this in chat buffer when executing some tools. Looks like an issue with directory names.

$ rg "emacs" -n "C:UsersMarko.KocicAppDataRoamingnpmnode_modules@mariozechnerpi-coding-agent" || true
C:\Users\Marko.Kocic\AppData\Roaming\npm\node_modules\@mariozechner\pi-coding-agent\docs\tui.md:792:Replace the main input editor with a custom implementation. Useful for modal editing (vim), different keybindings (emacs), or specialized input handling.
C:\Users\Marko.Kocic\AppData\Roaming\npm\node_modules\@mariozechner\pi-coding-agent\docs\extensions.md:1666:// Custom editor (vim mode, emacs mode, etc.)
C:\Users\Marko.Kocic\AppData\Roaming\npm\node_modules\@mariozechner\pi-coding-agent\docs\extensions.md:1741:Replace the main input editor with a custom implementation (vim mode, emacs mode, etc.):
C:\Users\Marko.Kocic\AppData\Roaming\npm\node_modules\@mariozechner\pi-coding-agent\examples\extensions\plan-mode\utils.ts:40:	```

[dnouri]

@markokocic Fixed in #147. If that doesn't fix it, please reopen.