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.

Waiting On

• [1.21.3] Expose RecipeManager#recipes NeoForge#1620
• Xfact's updates to IClientExtensions for armor model setup

Relevant Issues

Closes #177
Closes #179
Closes #180
Closes #181
Closes #183
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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Preview URL: https://pr-178.neoforged-docs-previews.pages.dev

[neoforged-pages-deployments]

Deploying with Cloudflare Pages

Name	Result
Last commit:	1d378c6b18b616baf1c3a558f5d7c0a577b1e4a7
Status:	✅ Deploy successful!
Preview URL:	https://4425ff17.neoforged-docs-previews.pages.dev
PR Preview URL:	https://pr-178.neoforged-docs-previews.pages.dev

[ChampionAsh5357]

Gonna mark this as ready for review since I'm just waiting on two PRs from NeoForge: one of mine to expose the recipe map, and one from xfact about the armor model client extensions.