Resolve path when adding to zip

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"create_zip" script

When adding files to the zip, the file path is not "resolved", resulting in errors in some cases (eg: when using UNC paths).

For example in Windows if OpenPype is installed on a mapped network drive:

• Let's consider the directory "\\192.168.1.1\dev" mapped to drive "W" (containing the OpenPype cloned repository).
• In a PowerShell session, if the current directory is "W:\OpenPype", and the script ".\tools\create_zip.ps1" is executed, the following error occurs:

ValueError: 'W:\\OpenPype\\igniter\\...\\openpype\\action.py' does not start with '\\\\192.168.1.1\\dev\\OpenPype'

and the zip creation is cancelled.
If executing the script in "\\192.168.1.1\dev\OpenPype", the error doesn't occur.

By resolving the path, we avoid the issue.