Clean repo for open source release

Remove build artifacts, dev tool configs, unused dependencies,
and third-party source dumps. Add proper README, update .gitignore,
clean up Makefile.

src/main/java/com/tiedup/remake/util/tasks/SaleLoader.java

@@ -0,0 +1,103 @@
+package com.tiedup.remake.util.tasks;
+
+import com.tiedup.remake.core.TiedUpMod;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Loads and manages sale prices for slave trading.
+ *
+ * Phase 14.3.5: Sale system
+ *
+ * Provides default sale prices and can be extended
+ * to load from config files in the future.
+ *
+ * Based on original SaleLoader from 1.12.2
+ */
+public class SaleLoader {
+
+    private static final Random RANDOM = new Random();
+
+    /** List of available sale prices */
+    private static final List<ItemTask> SALES = new ArrayList<>();
+
+    /** Whether sales have been initialized */
+    private static boolean initialized = false;
+
+    /**
+     * Initialize default sales.
+     * Called on mod initialization.
+     */
+    public static void init() {
+        if (initialized) return;
+
+        // Default sale prices
+        SALES.add(new ItemTask("minecraft:iron_ingot", 10));
+        SALES.add(new ItemTask("minecraft:iron_ingot", 20));
+        SALES.add(new ItemTask("minecraft:gold_ingot", 10));
+        SALES.add(new ItemTask("minecraft:gold_ingot", 15));
+        SALES.add(new ItemTask("minecraft:diamond", 3));
+        SALES.add(new ItemTask("minecraft:diamond", 5));
+        SALES.add(new ItemTask("minecraft:emerald", 5));
+        SALES.add(new ItemTask("minecraft:emerald", 10));
+
+        initialized = true;
+
+        TiedUpMod.LOGGER.info(
+            "[SaleLoader] Loaded {} default sales",
+            SALES.size()
+        );
+    }
+
+    /**
+     * Get a random sale price.
+     *
+     * @return Random ItemTask for sale price
+     */
+    public static ItemTask getRandomSale() {
+        if (SALES.isEmpty()) {
+            // Fallback if not initialized
+            return new ItemTask("minecraft:iron_ingot", 10);
+        }
+
+        return SALES.get(RANDOM.nextInt(SALES.size()));
+    }
+
+    /**
+     * Get all available sale prices.
+     *
+     * @return List of all sales
+     */
+    public static List<ItemTask> getAllSales() {
+        return new ArrayList<>(SALES);
+    }
+
+    /**
+     * Check if sales are available.
+     *
+     * @return true if at least one sale is configured
+     */
+    public static boolean hasSales() {
+        return !SALES.isEmpty();
+    }
+
+    /**
+     * Add a custom sale price.
+     *
+     * @param sale The sale to add
+     */
+    public static void addSale(ItemTask sale) {
+        if (sale != null) {
+            SALES.add(sale);
+        }
+    }
+
+    /**
+     * Clear all sales (for reloading).
+     */
+    public static void clear() {
+        SALES.clear();
+        initialized = false;
+    }
+}