Add common pathing code and SimplePathing module

src/main/java/com/replaymod/pathing/interpolation/InterpolationParameters.java

@@ -0,0 +1,28 @@
+package com.replaymod.pathing.interpolation;
+
+import lombok.Data;
+
+/**
+ * Parameters which can be used to make an interpolation more fitting to the previous one.
+ */
+@Data
+public class InterpolationParameters {
+    /**
+     * The final value.
+     * Should be the same as for the final property.
+     * If it differs though, this value should be preferred.
+     */
+    private final double value;
+
+    /**
+     * Velocity at the end of the interpolation.
+     * Normally this is the first derivative of the interpolating function at the end of the interpolation.
+     */
+    private final double velocity;
+
+    /**
+     * Acceleration at the end of the interpolation.
+     * Normally this is the second derivative of the interpolating function at the end of the interpolation.
+     */
+    private final double acceleration;
+}