Add telemetry packet specifiers to the FPP spec

[bocchino]

Closes #564.

I'll schedule a meeting to go over the proposed changes to the spec.

[bocchino]

Review on January 16, 2025

Here is a summary of the action items and their status.

Item	Status
In the User's Guide, make sure to explain how module qualification works	Added a note to the issue on updating the User's Guide: #568
In section 7.16, fix typo: telemetry-channel-sequence should be telemetry-channel-identifier-sequence	Done
Allow include specifiers in packet specifiers and packet group specifiers	Done
In the next version of the packet spec, add a capability to send out specified packets on specified cycles	See #573

[bocchino]

I have addressed all the comments from the in-person review. See the summary table above.