Added NoTrail, Slowmotion and BulletFreezeRemove Pickups

Also refactored Extinguisher to remove particles from the end (still wonky though)

Assets/Scripts/Game/Pickups/BulletFreezeRemove.cs

@@ -0,0 +1,63 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class BulletFreezeRemove : Pickup 
+{
+    public ParticleSystem freezeParticles;
+    // Start is called before the first frame update
+    void Start()
+    {
+        
+    }
+
+    public override void OnPickup()
+    {
+        //hide renderer
+        GetComponent<MeshRenderer>().enabled = false;
+        GetComponent<Collider>().enabled = false;
+        Debug.Log("Start thingy");
+        //find all particles in the scene and freeze them
+        ParticleSystem[] particleSystems = FindObjectsOfType<ParticleSystem>();
+
+        foreach (ParticleSystem particleSystem in particleSystems)
+        {
+            //if root gameobject has no pattern component it's not a pattern
+            GameObject root = particleSystem.transform.root.gameObject;
+            if (!root.GetComponent<Pattern>())
+            {
+                return;
+            }
+           
+            int particleCount = particleSystem.particleCount;
+            ParticleSystem.Particle[] particles = new ParticleSystem.Particle[particleCount];
+            particleSystem.GetParticles(particles);
+
+            for (int i = 0; i < particleCount; i++)
+            {
+                particles[i].velocity = Vector3.zero;
+            }
+            
+            particleSystem.SetParticles(particles, particleCount);
+            StartCoroutine(RemoveParticle(particles, particleCount, particleSystem));
+        }
+
+        
+
+    }
+
+    //coroutine that takes a collection of particles and removes one at a time
+    IEnumerator RemoveParticle(ParticleSystem.Particle[] particles, int particleCount, ParticleSystem particleSystem)
+    {
+        //Remove all particles over a span of .5 seconds
+        for (int i = 0; i < particleCount; i++)
+        {
+            particles[i].remainingLifetime = 0.0f;
+            particleSystem.SetParticles(particles, particleCount);
+            //instantiate freeze particles at the position of the particle
+            Instantiate(freezeParticles, particles[i].position, Quaternion.identity);
+            yield return new WaitForSeconds(0.5f/particleCount);
+        }
+    }
+
+}