🐛Fixed Imu::is_calibrating function for PROS 3 #626 (#628)

* Updated Imu::is_calibrating function

* Update main.cpp

* Updated enum for imu_status_e

Update to properly reflect what get_status returns

* Added comments to imu.h

Elaborating on imu_status_e value types

* Reverted main.cpp

include/pros/imu.h

@@ -29,7 +29,8 @@ namespace c {
 #endif
 
 typedef enum imu_status_e {
-	E_IMU_STATUS_CALIBRATING = 0x01,
+	E_IMU_STATUS_READY = 0, // IMU is connected but not currently calibrating
+	E_IMU_STATUS_CALIBRATING = 19, // IMU is calibrating
 	E_IMU_STATUS_ERROR = 0xFF,  // NOTE: used for returning an error from the get_status function, not that the IMU is
 	                            // necessarily in an error state
 } imu_status_e_t;

src/devices/vdml_imu.cpp

@@ -62,7 +62,7 @@ pros::c::imu_status_e_t Imu::get_status() const {
 }
 
 bool Imu::is_calibrating() const {
-	return get_status() & pros::c::E_IMU_STATUS_CALIBRATING;
+	return get_status() == pros::c::E_IMU_STATUS_CALIBRATING;
 }
 
 std::int32_t Imu::tare_heading() const {