fix: parsing multiple filepath formats

[biplobmanna]

Parse windows style and *nix style host filepath properly

Examples, of what's accepted:

• windows filepath
  • eg: C:\some\thing
  • eg: C:/some/thing
• *nix style filepath
  • eg: /mnt/C/some/thing
  • eg: /host_mnt/C/some/thing
  • eg: /run/desktop/mnt/host/C/some/thing

Logic:

• First check if valid Windows Filepath
• Next, parse *nix style filepath
  • convert to windows filepath

Created a PR based on my comment in another PR for this

[biplobmanna]

Logic of the regex:

1. ^[a-zA-Z]\:(/|\\\\).*$

• Check the first char is a valid drive letter
• Check the second is : (colon)
• Check the third char is / (slash) or \ (backslash)
• The rest doesn't matter (as it's presumed a valid path is always passed)

2. ^(?:.*)?/([a-zA-Z])/(.*)$

• ?: says that it's a non-capturing group
• don't capture anything until we find / (slash) followed by a valid drive-letter
• the next should be / (slash)
• the rest don't matter (as it's presumed a valid path is always passed)