api: add projectile creation api

runelite-api/src/main/java/net/runelite/api/Client.java

@@ -1034,6 +1034,26 @@ public interface Client extends GameEngine
 	@Nullable
 	LocalPoint getLocalDestinationLocation();
 
+	/**
+	 * Create a projectile.
+	 * @param id projectile/spotanim id
+	 * @param plane plane the projectile is on
+	 * @param startX local x coordinate the projectile starts at
+	 * @param startY local y coordinate the projectile starts at
+	 * @param startZ local z coordinate the projectile starts at - includes tile height
+	 * @param startCycle cycle the project starts
+	 * @param endCycle cycle the projectile ends
+	 * @param slope
+	 * @param startHeight start height of projectile - excludes tile height
+	 * @param endHeight end height of projectile - excludes tile height
+	 * @param target optional actor target
+	 * @param targetX target x - if an actor target is supplied should be the target x
+	 * @param targetY taret y - if an actor target is supplied should be the target y
+	 * @return the new projectile
+	 */
+	Projectile createProjectile(int id, int plane, int startX, int startY, int startZ, int startCycle, int endCycle,
+		int slope, int startHeight, int endHeight, @Nullable Actor target, int targetX, int targetY);
+
 	/**
 	 * Gets a list of all projectiles currently spawned.
 	 *

runelite-api/src/main/java/net/runelite/api/Deque.java

@@ -29,6 +29,12 @@ package net.runelite.api;
  */
 public interface Deque<T> extends Iterable<T>
 {
+	/**
+	 * Add a new element to the end of the deque
+	 * @param t the element
+	 */
+	void addLast(T t);
+
 	/**
 	 * clear the deque
 	 */