Catch PermissionError

[tomschr]

Project Version

0.13.0

Python Version

3.12, 3.13, 3.14

Operating System

Linux

Steps to Reproduce

1. Copy the etc/docbuild/env.example.toml to env.devel.toml

2. Run the following command:

   docbuild --env-config env.devel.toml metadata 'suse-ai/1.0/en-us

3. See the exception:

   PermissionError: [Errno 13] Permission denied: '/data'

Expected Behavior

If the script cannot write to the given directory, we want a good error message.

Perhaps this issue may be solved through Pydantic validation.

Actual Behavior

No response

Additional Information

Related #21