Separate timers and pended functions

[tcpluess]

As discussed in #593 , this is a WIP implementation of a task whose only purpose is to wait for "work tasks" being sent to a queue. The task then executes the requested callback functions with the lowest priority.
We should discuss if something like this is useful. I believe it is better to have this separated from the timers.

Note this is WIP, so I have not yet implemented every detail (like for instance static allocation).

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

Base: 94.30% // Head: 94.30% // No change to project coverage 👍

Coverage data is based on head (bdbc70a) compared to base (91927ab).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #596   +/-   ##
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  Coverage   94.30%   94.30%           
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  Files           6        6           
  Lines        2370     2370           
  Branches      579      579           
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  Hits         2235     2235           
  Misses         85       85           
  Partials       50       50           

Flag	Coverage Δ
unittests	94.30% <ø> (ø)

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[jasonpcarroll]

Hi @tcpluess,

Thank you for your contribution! I have notified a member of the team to take a look.

Best,

Jason Carroll

[aggarg]

I am not sure this should necessarily be a part of kernel but it certainly is a good demo. Would you rather contribute this as a demo to this repo - https://github.com/FreeRTOS/FreeRTOS-Partner-Supported-Demos

[alfred2g]

Closing PR, as Creating a similar Demo is suggested