[docs] Add missing docs to enum fields (NFC) (#6150)

Co-authored-by: Tyler Veness <calcmogul@gmail.com>

hal/src/main/java/edu/wpi/first/hal/CANAPITypes.java

@@ -23,18 +23,31 @@ public final class CANAPITypes {
    *     Device Types</a>
    */
   public enum CANDeviceType {
+    /** Broadcast. */
     kBroadcast(0),
+    /** Robot controller. */
     kRobotController(1),
+    /** Motor controller. */
     kMotorController(2),
+    /** Relay controller. */
     kRelayController(3),
+    /** Gyro sensor. */
     kGyroSensor(4),
+    /** Accelerometer. */
     kAccelerometer(5),
+    /** Ultrasonic sensor. */
     kUltrasonicSensor(6),
+    /** Gear tooth sensor. */
     kGearToothSensor(7),
+    /** Power distribution. */
     kPowerDistribution(8),
+    /** Pneumatics. */
     kPneumatics(9),
+    /** Miscellaneous. */
     kMiscellaneous(10),
+    /** IO breakout. */
     kIOBreakout(11),
+    /** Firmware update. */
     kFirmwareUpdate(31);
 
     @SuppressWarnings("PMD.MemberName")
@@ -56,22 +69,39 @@ public final class CANAPITypes {
    *     Manufacturer IDs</a>
    */
   public enum CANManufacturer {
+    /** Broadcast. */
     kBroadcast(0),
+    /** National Instruments. */
     kNI(1),
+    /** Luminary Micro. */
     kLM(2),
+    /** DEKA Research and Development Corp. */
     kDEKA(3),
+    /** Cross the Road Electronics. */
     kCTRE(4),
+    /** REV Robotics. */
     kREV(5),
+    /** Grapple. */
     kGrapple(6),
+    /** MindSensors. */
     kMS(7),
+    /** Team use. */
     kTeamUse(8),
+    /** Kauai Labs. */
     kKauaiLabs(9),
+    /** Copperforge. */
     kCopperforge(10),
+    /** Playing With Fusion. */
     kPWF(11),
+    /** Studica. */
     kStudica(12),
+    /** TheThriftyBot. */
     kTheThriftyBot(13),
+    /** Redux Robotics. */
     kReduxRobotics(14),
+    /** AndyMark. */
     kAndyMark(15),
+    /** Vivid-Hosting. */
     kVividHosting(16);
 
     @SuppressWarnings("PMD.MemberName")

hal/src/main/java/edu/wpi/first/hal/SimDevice.java

@@ -16,9 +16,13 @@ package edu.wpi.first.hal;
  * edu.wpi.first.wpilibj.ADXRS450_Gyro} for an example implementation.
  */
 public class SimDevice implements AutoCloseable {
+  /** Sim device direction. */
   public enum Direction {
+    /** Input direction for simulation devices. */
     kInput(SimDeviceJNI.kInput),
+    /** Output direction for simulation devices. */
     kOutput(SimDeviceJNI.kOutput),
+    /** Bidirectional direction for simulation devices. */
     kBidir(SimDeviceJNI.kBidir);
 
     public final int m_value;