Update to 1.21.2

[ChampionAsh5357]

Applies the contribution formatting and updates the docs to 1.21.2. This is a separate section due to the large number of changes between versions.

Relevant Issues

Closes #177
Closes #179
Closes #180
Closes #181
Supersedes #174

Subsections

• Advanced
• Block Entities
• Blocks
• Concepts
• Data Storage
• Getting Started
• GUI
• Items
• Legacy
• Misc
• Networking
• Resources
  • Client
    • Models
  • Server
    • Data Maps
    • Enchantments
    • Loot Tables
    • Recipes
• World Generation

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Name	Result
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PR Preview URL:	https://pr-178.neoforged-docs-previews.pages.dev