Fix javadoc warnings (#2266)

Persuant to #1093, I added as many docstrings as I could, at least for
things I knew about. Some of the classes I just suppressed the Javadoc
warnings in because they aren't particularly useful to document. This
gets us down to less than 100 Javadoc warnings in total. Docs for core
classes on the C++ side were also added for parity.

photon-lib/src/main/java/org/photonvision/simulation/VisionTargetSim.java

@@ -40,7 +40,7 @@ public class VisionTargetSim {
      * Describes a vision target located somewhere on the field that your vision system can detect.
      *
      * @param pose Pose3d of the tag in field-relative coordinates
-     * @param model TargetModel which describes the shape of the target
+     * @param model TargetModel which describes the geometry of the target
      */
     public VisionTargetSim(Pose3d pose, TargetModel model) {
         this.pose = pose;
@@ -52,7 +52,7 @@ public class VisionTargetSim {
      * Describes a fiducial tag located somewhere on the field that your vision system can detect.
      *
      * @param pose Pose3d of the tag in field-relative coordinates
-     * @param model TargetModel which describes the shape of the target(tag)
+     * @param model TargetModel which describes the geometry of the target(tag)
      * @param id The ID of this fiducial tag
      */
     public VisionTargetSim(Pose3d pose, TargetModel model, int id) {
@@ -61,18 +61,38 @@ public class VisionTargetSim {
         this.fiducialID = id;
     }
 
+    /**
+     * Sets the pose of this target on the field.
+     *
+     * @param pose The pose in field-relative coordinates
+     */
     public void setPose(Pose3d pose) {
         this.pose = pose;
     }
 
+    /**
+     * Sets the model describing this target's geometry.
+     *
+     * @param model The model of the target
+     */
     public void setModel(TargetModel model) {
         this.model = model;
     }
 
+    /**
+     * Returns the pose of this target on the field.
+     *
+     * @return The pose in field-relative coordinates
+     */
     public Pose3d getPose() {
         return pose;
     }
 
+    /**
+     * Returns the model describing this target's geometry.
+     *
+     * @return The model of the target
+     */
     public TargetModel getModel() {
         return model;
     }