fix: Change the error to a warning when searching for font path

[Jklawreszuk]

PR Details

This PR includes a fix for searching the font path on Linux. Previously when a font did not exist CompilerApp ignored the search for a default font, because of error.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built an engine and run the game to try this change out.

[Eideren]

Looks good, thanks !