Fix minimap MSAA pipeline, defer swapchain recreation, fix player character spawn order

- Add .setMultisample() to minimap display pipeline and recreatePipelines() for MSAA changes
- Defer all swapchain recreation in window.cpp to beginFrame() via markSwapchainDirty()
  to prevent mid-frame render pass destruction crashes on resolution/fullscreen change
- Move spawnPlayerCharacter() call to after loadTestTerrain() where character renderer exists

include/rendering/minimap.hpp

@@ -25,6 +25,7 @@ public:
 
     bool initialize(VkContext* ctx, VkDescriptorSetLayout perFrameLayout, int size = 200);
     void shutdown();
+    void recreatePipelines();
 
     void setAssetManager(pipeline::AssetManager* am) { assetManager = am; }
     void setMapName(const std::string& name);

include/rendering/vk_context.hpp

@@ -70,6 +70,7 @@ public:
     const std::vector<VkFramebuffer>& getSwapchainFramebuffers() const { return swapchainFramebuffers; }
 
     bool isSwapchainDirty() const { return swapchainDirty; }
+    void markSwapchainDirty() { swapchainDirty = true; }
 
     // MSAA
     VkSampleCountFlagBits getMsaaSamples() const { return msaaSamples_; }