co⚡e: Sparkplug™ MQTT edge

[#90] 1.4.2.24 Added unfinished FB_Property, which can be registered with an FB_Metric

[#90] 1.4.2.23 Added IProperty and IPropertyOwner
Fixed Copmile error in ClaimNextFreeKey

[#90] 1.4.2.22 An FB_Payload can now dynamically create (PropertySet) Keys
Need now:
* an FB_Property, with factory, which can be registered to an FB_Metric.itfMetric
* testing

also added the ability to dynamically create (Dataset) Columns

[#90] 1.4.2.21 An FB_Payload can now dynamically create FB_PayloadPropertySetValue(s)
Need now:
* a LinkedListWStringElementFactory for the PropertySetKeys
* an FB_Property, with factory, which can be registered to an FB_Metric.itfMetric
* testing

[#144] continue work towards FB_WStringBuilder larger string size
Append, Delete, Find, InsertAt have been modified
No testing done yet
The other methods still can be checked

[#138] Fixed missing seqNums v1.4.2.19

NDATA_publish was immediately exited, and the next publish does not wait and receives the DONE flag of the previous publish.

Sparkplug Development Lib v1.4.2.18 changelog, still work in progress
* changed Project Information

* Changed FB_MetricFileTransfer.ReturnFileName (Maybe it should return the filetransfer properties (filesize, filename, full path, any other metadata on the file?)

* Changed FB_StringBuilder as preliminary unittesting shows it contains bugs
regarding WSTRING(80) which is nonsensical for WSTRING

* FB_StringBuilder main body
* FB_StringBuilder.append
* FB_StringBuilder.delete
* FB_StringBuilder.find
* FB_StringBuilder.insertat
* FB_StringBuilder.len
* FB_StringBuilder.mid
* FB_StringBuilder.replaceat
* FB_StringBuilder.right
* FB_StringBuilder.tostring
* FB_StringBuilder.towstring
* Changed ILimitedStringBuilder, EXTENDS __SYSTEM.IQueryInterface
* Changed IStringBuilder, EXTENDS ILimitedStringBuilder
* Added Function ReturnFileName as this function seems to be useful enough
* Added accompanying unittest for FB_StringBuilder in seperate project, also work in progress

v1.4.2.17 Started implementation of
FB_MetricFileTransfer

Branch v1.4.2.16
introduces FB_FileControl
and IFileTransfer
for the yet to be written FB_MetricFileTransfer

[#134] Library is now displayed even if "show advanced libraries" is not selected
added Application|Utils to library categories

v1.4.2.14
* Added FB_SeqCheck with methods: BDSeqNum and SeqNum
* Updated Project Information to enable documentation generation

[#138] [#137] v1.4.2.13 Fixed missing DBIRTH and Edge Publish Rates

v1.4.2.12 Library now uses FBFactory to create GroupIDs, RemoteEdges, RemoteDevices and Metrics
You now no longer need to add GroupID, Edge, Device and metric pools in the user project of the PrimaryHost

v1.4.2.11
Fixed: Time to Wait after a succesful publish (this is a blocking time during which data will not be sent)

v1.4.2.10
Fixed [#136] Edge seems to publish "empty" payloads

[#131] v1.4.2.9 fixes issue with skipping DBIRTHs and DDEATHs
incidentally, device messages are now more responsive, as we publish additionally whenever the Node is WAITing for NDATA timer

v1.4.2.8 library changed identity to:
co⚡e: Sparkplug™ MQTT edge and host
CODESYS + MQTT + Sparkplug = 'Plug & Play' IIoT

[#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

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

branch develop : lets keep developing