Create fr_fr.json

[JustArthur]

Added the French (France) translation of the mod

[what-the-diff]

PR Summary

• Introduction of French Language Support in Skin Layer Settings
  A new French language file has been added that aids in clear understanding and manipulation of skin layers settings for French speaking users. The file contains translations for 36 different items.

• Inclusion of Translations for Titles and Tooltips
  The adjusted settings involve translations of various 3D skin layer options, such as hats, jackets, sleeves, and pants. These translations will help users understand the functionalities better.

• New Settings for Voxel Sizes and Render Distance
  New settings have been introduced to adjust voxel sizes and the render distance related to 3D skins and their graphics. This allows users to customize their graphics settings to match their hardware capabilities and personal preferences.