Added documentation (robot_motion_tracking_system.md and MotionProcessor.md)

docs/documentation/android/code_documentation/MotionProcessor.md

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+## Class Implementation - MotionProcessor
+
+---
+
+#### Methods
+
+Creates a WebSocket server and starts listening for incoming MotionData messages
+```java
+public void startListening() { ... }
+```
+
+Stops the WebSocket server and stops listening for incoming MotionData messages
+```java
+public void stopListening() { ... }
+```
+
+Parses an incoming WebSocket message packet and processes the data.
+The data that is accepted is a string that can be of the following formats:
+- "data `Ax`;`Ay`;`Az`;`Rx`;`Ry`;`Rz`"
+- "sampleRate `x`"
+- "calibrate `x`;`y`;`z`"
+```java
+public void parsePacket(@NotNull String message) { ... }
+```
+
+Processes the provided MotionData object, uses it as a relative path point, and calls the  
+motionDataEventHandler with the calculated vector.
+```java
+public void addMotionData(MotionData data) { ... }
+```
+
+Updates the relative path to the provided path.
+```java
+public void setRelativePath(List<Vector3> relativePath) { ... }
+```
+
+Sets the motionDataEventHandler to the provided handler.
+```java
+public void setMotionDataEventHandler(Consumer<Vector3> consumer) { ... }
+```
+
+Calculate the relative vector given a MotionData object.
+This converts relative acceleration and rotation to a vector, taking the
+sample rate into account.
+```java
+public Vector3 getRelativeVector(MotionData motionData) { ... }
+```
+
+Get a list of error values given the provided GesturePath.
+This compares the relative path (calibrated) to the provided path segments,
+and returns the offsets.
+```java
+public List<Double> getErrors(GesturePath referencePath) { ... }
+```
+
+Get the error offset of the provided vector to the provided path.
+This compares a given vector to the provided GesturePath object.
+```java
+public double getError(GesturePath path, Vector3 referencePoint) { ... }
+```
+
+Get the average error offset of the relative path and the provided GesturePath object.
+```java
+public double getAverageError(GesturePath referencePath) { ... }
+```