chore: remove redundant files, fix app:setup symlinks

- Remove antigravity-awesome-skills-5.9.0.tgz (npm pack artifact)
- Remove .DS_Store from tracking
- Stop tracking web-app/public/skills and skills.json (generated by app:setup)
- Add .DS_Store, .ruff_cache, *.tgz, web-app/public/skills to .gitignore
- Fix setup_web.js: use statSync to follow symlinks (fixes ENOTDIR on CLAUDE.md)

Made-with: Cursor

web-app/public/skills/unreal-engine-cpp-pro/examples/ExampleActor.h

@@ -1,57 +0,0 @@
-#pragma once
-
-#include "CoreMinimal.h"
-#include "GameFramework/Actor.h"
-#include "ExampleActor.generated.h"
-
-// Forward overrides to reduce compile times
-class UBoxComponent;
-
-/**
- * AExampleActor
- * 
- * Demonstrates:
- * 1. Correct class prefix (A)
- * 2. UPROPERTY usage
- * 3. Soft references for assets
- */
-UCLASS()
-class MYGAME_API AExampleActor : public AActor
-{
-    GENERATED_BODY()
-    
-public:    
-    // Sets default values for this actor's properties
-    AExampleActor();
-
-protected:
-    // Called when the game starts or when spawned
-    virtual void BeginPlay() override;
-    
-    // Called when the game ends
-    virtual void EndPlay(const EEndPlayReason::Type EndPlayReason) override;
-
-public:    
-    // Called every frame
-    virtual void Tick(float DeltaTime) override;
-
-    /** Component exposed to Blueprint, but immutable logic in C++ */
-    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components")
-    UBoxComponent* RootCollision;
-
-    /** 
-     * Soft reference to an actor class to lazy load.
-     * Prevents hard reference chains.
-     */
-    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Config")
-    TSoftClassPtr<AActor> ActorTypeToSpawn;
-
-    /** Proper boolean naming convention 'b' */
-    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "State")
-    uint8 bIsActive:1;
-
-private:
-    /** Cached reference, not exposed to Blueprints */
-    UPROPERTY(Transient)
-    APlayerController* CachedPC;
-};