feat: Add latitude-based world generation with extra-large biomes

- Custom BiomeSource distributes biomes by Z coordinate (north=cold, south=hot)
- Extra-large biomes (~3000 blocks, 8x vanilla)
- Underground biomes follow surface temperature logic
- Always spawn in plains near Z=0
- Welcome message explaining latitude mechanics
- Uses amplified noise settings for higher mountains
- BOP biomes integrated in temperature bands
- Selectable as 'Large Latitude' world type in world creation
- New config section 'world_generation'
- Version bumped to 2.2.0

.claude/settings.local.json

@@ -15,7 +15,8 @@
       "WebSearch",
       "Bash(git add:*)",
       "Bash(git commit:*)",
-      "Bash(git push)"
+      "Bash(git push)",
+      "Bash(wc:*)"
     ]
   }
 }

.gitignore

@@ -0,0 +1,9 @@
+.gradle/
+build/
+run/
+*.iml
+.idea/
+*.class
+*.log
+*.lock
+*.bin

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'net.minecraftforge.gradle' version '[6.0.16,6.2)'
 }
 
-version = '2.1.5'
+version = '2.2.0'
 group = 'com.aulyrius.custom_ore_gen'
 archivesBaseName = 'custom_ore_gen'