Add i18n for display values and settings

[shifenis]

Pull Request Description

This pull request adds i18n support for display values and settings, and includes improvements and fixes across importers, parsing, traits, and layouts.

Changes Proposed

• Added i18n support for display values and settings.
• Added support for additional variables in the 5etools importer.
• Improvements to trait modification behavior.
• Fixed crash caused by a . in layout names.
• Fixed dice parser issues when numeric property values were used.
• Exposed LinkStringifier and MarkdownRenderer on the Fantasy Statblocks API.
• Initial implementation of the Pathbuilder importer.
• Added Pathfinder 2e creature layout.
• Allow saves with a value of 0.

Related Issues

None

Checklist

[x] I have read the contribution guidelines and code of conduct.
[x] I have tested the changes locally and they are working as expected.
[x] I have added appropriate comments and documentation for the code changes.
[x] My code follows the coding style and standards of this project.
[x] I have rebased my branch on the latest main (or master) branch.
[x] All tests (if applicable) have passed successfully.
[x] I have run linters and fixed any issues.
[x] I have checked for any potential security issues or vulnerabilities.