Add WinRM dir command

[NeffIsBack]

Description

Adds --dir for WinRM, just a bit convenience (and makes it similar to smb).
Also fixes a bug in --get-file where the auto completion of the local path was borked because it didn't properly differentiate between linux and Windows paths.
Fyi, also changed the default encoding to pysrp's default, because otherwise it would crash while decoding german characters such as ä.

Type of change

Insert an "x" inside the brackets for relevant items (do not delete options)

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Deprecation of feature or functionality
• This change requires a documentation update
• This requires a third party update (such as Impacket, Dploot, lsassy, etc)
• This PR was created with the assistance of AI (list what type of assistance, tool(s)/model(s) in the description)

Setup guide for the review

1. nxc winrm ... --dir
2. When doing nxc winrm ... --get-file '\remote\path\file' ./ this would result in ./\remote\path\file which should actually be ./file.
3. Query a german host

Screenshots (if appropriate):