Crafting category issues

[Deadlock989]

Describe the issue Various issues around crafting categories.

• Diamond cutter (internally a gear component) has the wrong category, is currently assigned to crafting-small
• Mixers still hovering on the brink of total redundancy; mixing is a tiered category but since we lost a machine and there are now only six recipes, both the remaining machines can produce all six; there was once also a fluid-mixing category for way back when copper machines couldn't handle fluid connections, now empty; fix: de-tier this whole bundle
• For tiered categories, category-1 is always created but never used because item generator defaults to category for tier 1
• Assembler crafting is a bit odd, in that everything has ended up in crafting and crafting-2, with nothing in crafting-1, or any of the other vanilla categories including crafting-with-fluid
• There are too many categories with no recipes; some are vanilla's so no action but remove all the redundant ones

Factorio version, IR version 1.1.94, 3.1.9

Other mods installed n/a

[Deadlock989]

Categories removed/merged:

• mixing-1
• mixing-2 -> mixing
• mixing-3
• mixing-4
• mixing-5
• fluid-mixing
• crafting-1
• crafting-2 -> advanced-crafting
• crafting-3
• crafting-4
• crafting-5
• smelting-1
• smelting-4
• smelting-5
• grinding-1
• grinding-4
• grinding-5
• alloying-1
• alloying-4
• alloying-5
• natural
• capped-smelting

Other recipe changes:

• diamond-gear-wheel: crafting-small -> crafting