Use client-side commands for opening computer folders

Forge doesn't run client-side commands from sendUnsignedCommand, so we
still require a mixin there.

We do need to change the command name, as Fabric doesn't properly merge
the two command trees.

projects/fabric/src/client/java/dan200/computercraft/client/ComputerCraftClient.java

@@ -16,6 +16,8 @@ import dan200.computercraft.shared.peripheral.modem.wired.CableBlock;
 import dan200.computercraft.shared.platform.FabricConfigFile;
 import dan200.computercraft.shared.platform.FabricMessageType;
 import net.fabricmc.fabric.api.blockrenderlayer.v1.BlockRenderLayerMap;
+import net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback;
+import net.fabricmc.fabric.api.client.command.v2.FabricClientCommandSource;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
 import net.fabricmc.fabric.api.client.model.loading.v1.PreparableModelLoadingPlugin;
 import net.fabricmc.fabric.api.client.networking.v1.ClientPlayNetworking;
@@ -81,6 +83,10 @@ public class ComputerCraftClient {
             return cable.getCloneItemStack(state, hit, level, pos, player);
         });
 
+        ClientCommandRegistrationCallback.EVENT.register(
+            (dispatcher, registryAccess) -> ClientRegistry.registerClientCommands(dispatcher, FabricClientCommandSource::sendError)
+        );
+
         ((FabricConfigFile) ConfigSpec.clientSpec).load(FabricLoader.getInstance().getConfigDir().resolve(ComputerCraftAPI.MOD_ID + "-client.toml"));
     }
 }

projects/fabric/src/main/resources/fabric.mod.json

@@ -38,10 +38,6 @@
     },
     "mixins": [
         "computercraft.fabric.mixins.json",
-        {
-            "config": "computercraft-client.mixins.json",
-            "environment": "client"
-        },
         {
             "config": "computercraft-client.fabric.mixins.json",
             "environment": "client"