Data Compat for the Aether & Major Addons

[VoidLeech]

Adds/Expands recipe compat for:

• The Aether
• Aether Redux
• Ancient Aether
• Deep Aether

Consists of:

• Wood Cutting recipes (all)
• Flower Milling recipes (all)
• Grass Milling recipes (D_AET)
• Bucket Filling/Emptying recipes (AET, D_AET)
• Ore Crushing recipes (D_AET, A_AET)
• Path Pressing recipe (D_AET)
• Clay Milling recipe (A_AET)
• Mud Mixing recipe (D_AET)
• Additions to Tags (roots, fan_transparent, upright_on_belt, tree_attachments)

Concerns

Data-wise

• I haven't added milling/crushing recipes for the various stones/sands/gravels as I don't think there is a clear answer that could convincingly be authoritative.
• I Haven't added ore crushing recipes for AET Gravitite ore, A_AET Valkyrum ore, or AET_R Veridium ore as whether these drop raw versions of the ore is dependent on a config in Aether Redux.
• I haven't added milling recipes for some grasses/ferns since they have no drops (such as seeds) besides themselves in their loot tables, but could I guess still have milling recipes into dyes. Open to suggestions.
• Some of the Aether Redux flowers lack crafting recipes to dyes in the base mod but I felt it appropriate to still add milling recipes for these.
• Some of the flower milling recipes could maybe have a secondary output besides the main dye. Open to suggestions.
• Yes the infernia produces blaze powder, it does so in the base mod.

Code-wise

Generally, I've kept code changes to a minimum (helpers at most), except for:

• To facilitate some of the filling/emptying datagen, I've added two datagen classes that extend FluidStack and FluidIngredient, in name only, s.t. the datagen is not dependant on having the fluid exist at compile/runtime. (Deep Aether adds a new Fluid)

Then there's some observations that would imo improve the codebase but seem out of scope of this PR (by adding code additions/changes + refactors into a primarily data PR)

• I've added a new helper to MillingRecipeGen for modded flowers (or really anything that only outputs items available at compile/runtime) that could replace some of the current helpers that all just kinda seem like duplicates apart from the Mod used.
• Some of the various wood helpers could use some changes to make adding recipes/tags for stems/hyphae easier.
• The JEI category already produces this recipe from a capability? somewhere, but since I add a proper recipe draining the skyroot milk bucket correctly produces a skyroot bucket. Still displays though.
  
• Cloudcap & Jellyshroom cap blocks don't get broken by mechanical saws when they cut the stems, since mushroom blocks/the wart block (n/a) tag are hardcoded atm.

Anyone who wants to test this PR (I have) with all mods at once, must use Aether 1.4.2 and Aether Redux 2.0.17 as the latest version of Ancient Aether has a worldgen datapack conflict with the latest version of the Aether.