Don't force public variables to use Hungarian notation (#8774)

People generally have expressed a dislike for the Hungarian notation
used in member variables, especially in examples/templates, and our
styleguide shouldn't be forced on downstream consumers, so this removes
all Hungarian notation from the examples/templates.

There are _some_ benefits to Hungarian for private member variables
(like knowing what's a member vs. local in a PR review) so we'll keep
private member variables the same for now, but public variables should
no longer use Hungarian notation, since it looks much worse. A new PMD
XPath rule has been added to accomplish this goal. Some other
non-compliant variables were fixed for the new rule.

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTag.java

@@ -11,11 +11,11 @@ import org.wpilib.util.RawFrame;
 import org.wpilib.vision.apriltag.jni.AprilTagJNI;
 
 /** Represents an AprilTag's metadata. */
-@SuppressWarnings("MemberName")
 @Json
 public class AprilTag {
   /** The tag's ID. */
   @Json.Property("ID")
+  @SuppressWarnings("PMD.PublicFieldNamingConvention")
   public int ID;
 
   /** The tag's pose. */

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTagDetector.java

@@ -14,7 +14,6 @@ import org.wpilib.vision.apriltag.jni.AprilTagJNI;
  */
 public class AprilTagDetector implements AutoCloseable {
   /** Detector configuration. */
-  @SuppressWarnings("MemberName")
   public static class Config {
     /**
      * How many threads should be used for computation. Default is single-threaded operation (1
@@ -110,7 +109,6 @@ public class AprilTagDetector implements AutoCloseable {
   }
 
   /** Quad threshold parameters. */
-  @SuppressWarnings("MemberName")
   public static class QuadThresholdParameters {
     /** Threshold used to reject quads containing too few pixels. Default is 300 pixels. */
     public int minClusterPixels = 300;

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTagFieldLayout.java

@@ -216,19 +216,19 @@ public class AprilTagFieldLayout {
    * @throws UncheckedIOException If the layout does not exist.
    */
   public static AprilTagFieldLayout loadField(AprilTagFields field) {
-    if (field.m_fieldLayout == null) {
+    if (field.fieldLayout == null) {
       try {
-        field.m_fieldLayout = loadFromResource(field.m_resourceFile);
+        field.fieldLayout = loadFromResource(field.resourceFile);
       } catch (IOException e) {
         throw new UncheckedIOException(
-            "Could not load AprilTagFieldLayout from " + field.m_resourceFile, e);
+            "Could not load AprilTagFieldLayout from " + field.resourceFile, e);
       }
     }
     // Copy layout because the layout's origin is mutable
     return new AprilTagFieldLayout(
-        field.m_fieldLayout.getTags(),
-        field.m_fieldLayout.getFieldLength(),
-        field.m_fieldLayout.getFieldWidth());
+        field.fieldLayout.getTags(),
+        field.fieldLayout.getFieldLength(),
+        field.fieldLayout.getFieldWidth());
   }
 
   /**
@@ -264,11 +264,9 @@ public class AprilTagFieldLayout {
   }
 
   static class FieldDimensions {
-    @SuppressWarnings("MemberName")
     @Json.Property(value = "length")
     public final double fieldLength;
 
-    @SuppressWarnings("MemberName")
     @Json.Property(value = "width")
     public final double fieldWidth;
 

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTagFields.java

@@ -28,11 +28,11 @@ public enum AprilTagFields {
   public static final AprilTagFields kDefaultField = k2026RebuiltWelded;
 
   /** Resource filename. */
-  public final String m_resourceFile;
+  public final String resourceFile;
 
-  AprilTagFieldLayout m_fieldLayout;
+  AprilTagFieldLayout fieldLayout;
 
   AprilTagFields(String resourceFile) {
-    m_resourceFile = kBaseResourceDir + resourceFile;
+    this.resourceFile = kBaseResourceDir + resourceFile;
   }
 }

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTagPoseEstimate.java

@@ -7,7 +7,6 @@ package org.wpilib.vision.apriltag;
 import org.wpilib.math.geometry.Transform3d;
 
 /** A pair of AprilTag pose estimates. */
-@SuppressWarnings("MemberName")
 public class AprilTagPoseEstimate {
   /**
    * Constructs a pose estimate.

apriltag/src/main/java/org/wpilib/vision/apriltag/AprilTagPoseEstimator.java

@@ -10,7 +10,6 @@ import org.wpilib.vision.apriltag.jni.AprilTagJNI;
 /** Pose estimators for AprilTag tags. */
 public class AprilTagPoseEstimator {
   /** Configuration for the pose estimator. */
-  @SuppressWarnings("MemberName")
   public static class Config {
     /**
      * Creates a pose estimator configuration.

apriltag/src/test/java/org/wpilib/vision/apriltag/AprilTagDetectorTest.java

@@ -25,7 +25,6 @@ import org.wpilib.math.util.Units;
 import org.wpilib.util.runtime.RuntimeLoader;
 
 class AprilTagDetectorTest {
-  @SuppressWarnings("MemberName")
   AprilTagDetector detector;
 
   @BeforeAll