Sky's Better Carpets Mod Compat

Adds some more mod compat to [Sky's Better Carpets](https://modrinth.com/resourcepack/skys-better-carpets) resource pack.  Added compat: - Changed [Aether Redux](https://modrinth.com/mod/the-aether-redux)'s blightmoss carpet to use a moss-style overhang instead of a carpet-style overhang. - [Alex's Caves](https://modrinth.com/mod/alexs-caves)' guano layers now have a carpet-style overhang. Kind of looks gross. - Changed [Biomes O' Plenty](https://modrinth.com/mod/biomes-o-plenty)'s glowing moss carpet to use a moss-style overhang instead of a carpet style overhang. - Changed [Blue Skies](https://modrinth.com/mod/blue-skies)' sea moss carpet to use a moss-style overhang instead of a carpet style overhang. - Changed [Deep Aether](https://modrinth.com/mod/deep-aether)'s aether moss carpet to use a moss-style overhang instead of a carpet style overhang. - [Immersive Weathering](https://modrinth.com/mod/immersive-weathering)'s sand layers now have a snow-style overhang. - Changed [Pale Garden Backport](https://modrinth.com/mod/pale-garden-backport)'s pale moss carpet to use a moss-style overhang instead of a carpet style overhang. - Changed [Species](https://modrinth.com/mod/species)' alphacene moss carpet to use a moss-style overhang instead of a carpet style overhang. - [Spelunkery](https://modrinth.com/mod/spelunkery)'s dust layers now have a snow-style overhang. - [Supplementaries](https://modrinth.com/mod/supplementaries)' ash layers now have a snow-style overhang. - Changed [The Undergarden](https://modrinth.com/mod/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!](https://modrinth.com/mod/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)