feat(core): add explosion block destruction and knockback

core/include/vf/Explosion.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <unordered_map>
+#include <vector>
+#include "World.h"
+#include "Block.h"
+#include "Math.h"
+#include "BlockTick.h"
+
+namespace vf {
+
+struct ExplosionConfig {
+    float power = 4.0f;
+    int rayGridSize = 6;
+};
+
+struct BlockDrop {
+    Vec3i pos;
+    Block block;
+};
+
+struct ExplosionResult {
+    std::vector<Vec3i> destroyedBlocks;
+    std::vector<BlockDrop> drops;
+    std::vector<Vec3i> ignitedTnt;
+};
+
+float blastResistance(Block b);
+Block dropForBlock(Block b);
+
+ExplosionResult explode(World& world, const Vec3i& center, const ExplosionConfig& config = {});
+
+Vec3 explosionKnockback(const Vec3i& center, const Vec3& entityPos, float power);
+
+void igniteTnt(BlockTickScheduler& scheduler, const Vec3i& pos, int fuseTicks = 4);
+
+} // namespace vf