feat(personal-state): Convert personal state to use the work queue

This reduces the power consumption of the system by around .1 mA when the personal state is not active (and dynamic frequency scaling of the system clock is active)

Documentation/overview.rst

@@ -29,8 +29,6 @@ number of tasks that will have been keeping card10 running.  These are:
 +--------------------+-------------------------------+----------+-------------------------------------------+
 | `vInterruptsTask`_ | ``interrupts_task`` (static)  | +2       | Interrupt dispatcher worker               |
 +--------------------+-------------------------------+----------+-------------------------------------------+
-| `vLedTask`_        | -/-                           | +1       | LED Animations                            |
-+--------------------+-------------------------------+----------+-------------------------------------------+
 | `vMAX30001Task`_   | ``max30001_task_id`` (static) | +1       | `MAX30001`_ ECG driver                    |
 +--------------------+-------------------------------+----------+-------------------------------------------+
 | `vBhi160Task`_     | ``bhi160_task_id`` (static)   | +1       | `BHI160`_ sensor fusion driver            |