Arboria: Biome Enhancement

• 26.1 compatibility
• Decreased dead tree frequency in pale gardens

Updated to 1.21.9+ pack format

• Added firefly bushes in swamps, mangrove swamps, rivers, and most biomes near water
• Fallen trees can now generate with stumps
• Added leaf litter to forests, dark forests, wooded badlands and old growth birch forests
• Added bushes to plains, forests and birch forests
• Added wildflowers to birch forests and meadows

Fixed a bug that caused some pale oak trees to generate with too few branches

• 1.21.4 compatibility
• Overhauled the pale garden biome
• Fixed giant dark oaks sometimes generating too thin.