Build every version with Mojang mappings instead of Yarn

Minecraft ships unobfuscated from 26.1, and 1.21.11 has the last Yarn
release, so the shared src/ has to use Mojang's names before newer
versions can be added (#39).

Each version's sources were migrated with Loom's migrateMappings and
merged back into src/, so code that is only active on other versions
is migrated too. Where Mojang's names differ between 1.21.x versions,
src/ uses the newest ones: Stonecutter replacements swap in the older
Identifier/ResourceLocation and Avatar/Player renderer names, and
version comments cover the few package moves and renamed methods.

The fog mixin now targets setupFog on every version. Yarn's applyFog
named two methods from 1.21.6 on, so it also applied to updateBuffer.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

versions/1.21.10/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.10
-yarn_mappings=1.21.10+build.3
 loader_version=0.19.5
 
 fabric_api_version=0.138.4+1.21.10

versions/1.21.11/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.11
-yarn_mappings=1.21.11+build.4
 loader_version=0.19.5
 
 fabric_api_version=0.141.3+1.21.11

versions/1.21.4/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.4
-yarn_mappings=1.21.4+build.8
 loader_version=0.19.5
 
 # Mod Properties

versions/1.21.5/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.5
-yarn_mappings=1.21.5+build.1
 loader_version=0.19.5
 
 fabric_api_version=0.128.2+1.21.5

versions/1.21.6/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.6
-yarn_mappings=1.21.6+build.1
 loader_version=0.19.5
 
 fabric_api_version=0.128.2+1.21.6

versions/1.21.7/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.7
-yarn_mappings=1.21.7+build.8
 loader_version=0.19.5
 
 fabric_api_version=0.129.0+1.21.7

versions/1.21.8/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.8
-yarn_mappings=1.21.8+build.1
 loader_version=0.19.5
 
 fabric_api_version=0.136.1+1.21.8

versions/1.21.9/gradle.properties

@@ -8,7 +8,6 @@ org.gradle.configuration-cache=false
 # Fabric Properties
 # check these on https://fabricmc.net/develop
 minecraft_version=1.21.9
-yarn_mappings=1.21.9+build.1
 loader_version=0.19.5
 
 fabric_api_version=0.134.1+1.21.9