Sky's Better Carpets Mod Compat

Adds some more mod compat to Sky's Better Carpets resource pack.

Added compat:

• Changed Aether Redux's blightmoss carpet to use a moss-style overhang instead of a carpet-style overhang.
• Alex's Caves' guano layers now have a carpet-style overhang. Kind of looks gross.
• Changed Biomes O' Plenty's glowing moss carpet to use a moss-style overhang instead of a carpet style overhang.
• Changed Blue Skies' sea moss carpet to use a moss-style overhang instead of a carpet style overhang.
• Changed Deep Aether's aether moss carpet to use a moss-style overhang instead of a carpet style overhang.
• Immersive Weathering's sand layers now have a snow-style overhang.
• Changed Pale Garden Backport's pale moss carpet to use a moss-style overhang instead of a carpet style overhang.
• Changed Species' alphacene moss carpet to use a moss-style overhang instead of a carpet style overhang.
• Spelunkery's dust layers now have a snow-style overhang.
• Supplementaries' ash layers now have a snow-style overhang.
• Changed The Undergarden's mogmoss rugs to use a moss-style overhang instead of a carpet style overhang. (not sure about this one, might revert)

Other changes:

• Snow layers now use the snowy grass block side texture for the overhang texture to help it to blend-in better when on top of snowy grass.
• The first snow layers are now very very slightly shorter so flat texture flowers don't z-fight with snow when Snow! Real Magic! is active.
• Added generic parent models of snow layers to make it easier to use this style.
• Added a generic parent version of the moss carpet to make it easier to use this style.
• Added generic parent models of snow layers which instead use the carpet-style overhang for use in a specific mod compat case. (guano)