Added missing equality operations for DCMotor class

[jonathandao0]

Added missing equality operations for the DCMotor class. Currently, the following case fails:

var gearboxA = DCMotor.getKrakenX60(2);
var gearboxB = DCMotor.getKrakenX60(2);

gearboxA.equals(gearboxB); // returns false, should return true

[calcmogul]

This test isn't really necessary. It's a compiler-generated equality operator, and we don't write equality tests for other objects like this.

[jonathandao0]

Doesn't Pose2dTest.cpp implement this? Or is this just auto generated? I was looking at other cpp tests for reference of what to add (I'm not a heavy cpp user).

[calcmogul]

We only test the ones with non-default implementations.

[tav@myriad cpp]$ rg Equality
kinematics/SwerveModuleStateTest.cpp
130:TEST(SwerveModuleStateTest, Equality) {

kinematics/SwerveModulePositionTest.cpp
10:TEST(SwerveModulePositionTest, Equality) {

geometry/Rotation2dTest.cpp
65:TEST(Rotation2dTest, Equality) {

geometry/Pose2dTest.cpp
65:TEST(Pose2dTest, Equality) {

geometry/Translation3dTest.cpp
132:TEST(Translation3dTest, Equality) {

geometry/QuaternionTest.cpp
216:TEST(QuaternionTest, DotProductAsEquality) {

geometry/Twist3dTest.cpp
58:TEST(Twist3dTest, Equality) {

geometry/Translation2dTest.cpp
85:TEST(Translation2dTest, Equality) {

geometry/Rotation3dTest.cpp
290:TEST(Rotation3dTest, Equality) {

geometry/Twist2dTest.cpp
42:TEST(Twist2dTest, Equality) {

geometry/Pose3dTest.cpp
99:TEST(Pose3dTest, Equality) {