This pull request refactors how default values for several decision points are documented by moving their content into dedicated include files and updating various documentation pages to use these includes. This improves maintainability and consistency across the documentation. Additionally, it updates the markdown include plugin configuration to better handle relative links.

Documentation refactoring:

• Created new include files for default values of Exploitation, System Exposure, Safety Impact, and Mission Impact in the docs/_includes directory, consolidating their content for reuse. [1] [2] [3] [4]
• Updated multiple documentation pages (collect.md, gathering_info/exploitation.md, gathering_info/mission_impact.md, gathering_info/system_exposure.md, decision_points/exploitation.md, decision_points/mission_impact.md, decision_points/safety_impact.md, decision_points/system_exposure.md) to use the new markdown includes for default decision point values, replacing inline content. [1] [2] [3] [4] [5] [6] [7] [8]

Plugin configuration improvements:

• Updated the include-markdown plugin configuration in mkdocs.yml to enable rewrite_relative_links, ensuring that relative links in included markdown files resolve correctly.

Minor cleanup:

• Removed a stray blank line from the navigation section of mkdocs.yml for tidiness.