fix(css): prioritize pf2e icons over system font

[dylbrown]

Pull Request Description

When using the plugin on iOS with Pathfinder 2e, the action icons in the bestiary community content, which are ⬽ or similar in the descriptions, don't render using the "Pathfinder" icon font as they do on Windows. This is because the system-ui font takes precedence, and on iOS that font includes these icons.

Changes Proposed

• Place "Pathfinder" before system-ui in --statblock-content-font and --statblock-heading-font for pf2e.css
• Change the "Pathfinder" @font-face specification so it only includes the icons, the whitespace was breaking things on iOS

Related Issues

Obsidian-TTRPG-Community/Fantasy-Statblocks-CSS-Development#10

Checklist

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

Screenshots (if applicable)

Before	After

Additional Notes

N/A

[scooper4711]

I've been testing against main, which includes this fix, on MacOS. On MacOS, it appears to break displaying the ability scores, as the Pathfinder font doesn't include the number zero.

See #449