Update the Darc.md documentation to reflect changes implemented in the following PRs:

• Split Version.props into Version.props and Version.Details.props #5067
• Don't generate a Version Details Props header for repos with only SkipProperty dependencies #5209

Key points to address:

1. Version.Details.props File

   • Describe the addition of the new Version.Details.props file.
   • Document that if Version.Details.props exists, it will be used.
   • Explain when and how this file is generated or consumed.

2. SkipProperty Attribute in Version.Details.xml

   • Introduce and document the SkipProperty attribute that can be added in Version.Details.xml.
   • Describe its purpose and how it affects dependency management.

3. Other Relevant Changes

   • Summarize any additional relevant changes from the referenced PRs, such as header generation behavior for repos with only SkipProperty dependencies.

Ensure examples and configuration/process details are clear for users maintaining or integrating with Darc-managed repositories.