[docs] Set Doxygen extract_all to true and fix Doxygen failures (#3695)

The template argument order for UnscentedTransform was reversed to match
all the other UKF classes. Since UnscentedTransform is intended as a
class for internal use only, this shouldn't cause much breakage.

wpilibc/src/main/native/include/frc/shuffleboard/BuiltInWidgets.h

@@ -280,7 +280,7 @@ enum class BuiltInWidgets {
    * <br>Custom properties:
    * <table>
    * <tr><th>Name</th><th>Type</th><th>Default Value</th><th>Notes</th></tr>
-   * <tr><td>Range</td><td>{@link Range}</td><td>k16G</td><td>The accelerometer
+   * <tr><td>Range</td><td>Range</td><td>k16G</td><td>The accelerometer
    * range</td></tr> <tr><td>Show value</td><td>Boolean</td><td>true</td>
    * <td>Show or hide the acceleration values</td></tr>
    * <tr><td>Precision</td><td>Number</td><td>2</td>