feat(command): add command extraction for docs

src/main/kotlin/com/steelextractor/SteelExtractor.kt

@@ -29,6 +29,7 @@ import com.steelextractor.extractors.VillagerTypeRegistryExtractor
 import com.steelextractor.extractors.CandleCakes
 import com.steelextractor.extractors.ChunkStageHashes
 import com.steelextractor.extractors.CustomStatRegistryExtractor
+import com.steelextractor.extractors.Commands
 import com.steelextractor.extractors.GameEvents
 import com.steelextractor.extractors.Weathering
 import com.steelextractor.extractors.Strippables
@@ -216,6 +217,7 @@ object SteelExtractor : ModInitializer {
 
         addUnlessDisabled("BLOCKS") { Blocks() }
         addUnlessDisabled("BLOCK_ENTITIES") { BlockEntities() }
+        addUnlessDisabled("COMMANDS") { Commands() }
         addUnlessDisabled("DATA_COMPONENTS") { DataComponents() }
         addUnlessDisabled("ITEMS") { Items() }
         addUnlessDisabled("PARTICLE_TYPES") { ParticleTypeRegistryExtractor() }

src/main/kotlin/com/steelextractor/extractors/Commands.kt

@@ -0,0 +1,32 @@
+package com.steelextractor.extractors
+
+import com.google.gson.JsonArray
+import com.google.gson.JsonElement
+import com.google.gson.JsonObject
+import com.mojang.brigadier.tree.LiteralCommandNode
+import com.steelextractor.SteelExtractor
+import net.minecraft.server.MinecraftServer
+
+class Commands : SteelExtractor.Extractor {
+    override fun fileName(): String {
+        // This should be placed in the Steel-Docs repository.
+        return "commands.json"
+    }
+
+    override fun extract(server: MinecraftServer): JsonElement {
+        val commands = JsonArray()
+
+        for (node in server.commands.dispatcher.root.children) {
+            if (node !is LiteralCommandNode) continue
+            val element = JsonObject()
+            element.addProperty("name", "/" + node.name)
+            val redirect = (node.redirect as? LiteralCommandNode)?.literal
+            element.addProperty("class", "/" + (redirect ?: node.literal))
+            commands.add(element)
+        }
+
+        val output = JsonObject()
+        output.add("commands", commands)
+        return output
+    }
+}