co⚡e: Sparkplug™ MQTT edge

[#129] updated example for new library version 1.4.2.7

[#129] v1.4.2.7 SeqNums : Edge/Device Now successfully publishing with the correct seqnums
Changed SparkplugBSimple to also optionally accept a specific SeqNum

v1.4.2.6
Update: Devices now send DBIRTH, needs further testing/debugging
Check FB_Device.readyForPublish() -> called by: PublisherFound := itfMessageSource.readyForPublish();

v1.4.2.6

The first valid (but yet !UNTESTED!) attempt to let FB_Edge publish the Device Messages via IMessageSource
See statemachine step "PUB_DEV_MSGS"

As said, needs testing/debugging

PrimaryHost: Fixed a bug where you would hit an exception if there weren't enough Host Pool Objects

[#125] Updated example project. Primary host now sends xCMDs.
Note: The Edge Applications are still on an older version of the library, which publishes, but sometimes publishes out of sequence.

[#125] PrimaryHost now publishes NCMDs and DCMDs
Fixed bug with FB_EdgeTopicProvider.SetNCMDTopic
Note: currently only birthed metrics can be xCMDed. A generic xCMD is needed to, for example, send a Node Rebirth to a node which we have not yet received its birth certificate.

[#130] PrimaryHost itterator . Primary Host now itterates all its Edges and devices looking for an xCMD and publishes them

[#130] PrimaryHost itterator . Primary Host can now itterate all its Edges and devices looking for an xCMD

Edge: Fixed Compiler warning about external usage of VAR_IN_OUT for publish period

[#130] FB_RemoteEdge's IMessageSource now offers its own NCMDs as well

[#130] Host Itterator - RemoteEdges implement IMessageSource for their child devices
Still need to implement NCMDs in FB_RemoteEdge's IMessageSource

[#130] Host crawler - implemented IMessageSource in FB_RemoteDevice for DCMD

[#129] Renamed some functions
Corrected GetDBIRTH to GetDDATA

[#129] refactored IAuthor => IMessageSource
fixed IMessageSource method names to have the interface owner as the Subject of the verb
split informPublishDoneOrError() into two properties, PublisherDone and PublisherError

[#129] Progress towards IAuthor
Fixed a few VAR_IN_OUT warnings
TODO: use the IAuthor to publish messages in the Edge State Machine

[#129] Removed FB_DeviceMQTT's publisher
Renamed some of the IAuthor methods for clarity

[#129] Edge Itterator : FB_Edge is now an IAuthor
just kidding! he just goes through his little black book of devices and asks them:
"do you have anything worth publishing"?
Of course the FB_Device doesn't have his things in order yet. .: TODO

[#129] Edge Itterator : Added Method Stubs for an IAuthor

branch develop : lets keep developing

It is easier to tear down a branch than it is to remerge with the trunk :D

V1.4.2.5

Contains refactoring of FB_Metric for Edge / Device

BEWARE this commit still contains:
[#127] Edge / Device BUG SeqNums

Precursor for [#127] Edge / Device BUG SeqNums

[#102] Payload Refactor. Removed unneded Rebirth := _Rebirth

debugging on NBIRTH continued