- shrink utils source file, move heartbeat and boot management into system
- improvise with 'heartbeat' functionality. include scheduler implementation that will
manage the per-module heartbeat callbacks with individual 'mode' and
'interval' settings. current ones are mqtt (including relays, lights, thermostat), debug and
influxdb. preserve heartbeat NONE, ONCE and REPEAT, REPEAT_STATUS is effectively a hbReport & status bit.
- mqtt heartbeat is managed through mqttHeartbeat() callbacks
- tweak mqtt callbacks to use lists instead of the vector, slighly reducing the size of the .bin
- update WebUI, include report setting and update hbMode values
- make sure general.h settings include new heartbeat,
move constant definitions outside of the header
- correctly include dependencies through the .cpp, avoid leaking
internal details.
- as a side-effect, base headers are no longer included recursively

resolve #2310

* Completed kingart curtain switch support:
Added Web UI controls and view in status
Added power up behaviour (nothing, close, open, last position)
Added curtain style (Roller, etc...) for UI status and to be used in MQTT

* Checked commit before PR. Added html gulp static files generated.

* Corrected a code refactor error which make the MQTT messages not handling position from received messages. Added comment to debug tab to show how to enable debug

* Use the maximum compression for gzip. A byte is a byte :)

* Update code/espurna/curtain_kingart.cpp

Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>

* Variable name prefix update
Added public set position function and curtain count

* Added Scheduler new type : curtain

* Add curtain schedule support and correct the 12h bug when adding a slot (00:00 after refresh). Default Hour is 12h

* Code cleaning.
Schedule support.
Light support is having an issue with new schedules corrected here.

* I let do better by the specialists

* Curtain init statues

* Coding style corrections

* Removed debug stuff from now - will be back later with the right way

* rebuild webui

* revert 435f1c5e03 schHour default, rebuild ui

Co-authored-by: Eric Chauvet <eric.chauvet@test-tree.com>
Co-authored-by: Max Prokhorov <prokhorov.max@outlook.com>

This will add support for the KingArt Wifi Curtain Switch. There are no buttons in the web interface as I could not figure out how to create them (any help on that is welcome).

For now the switch can be controlled over MQTT:
"{hostname}/curtain/set"
"{hostname}/curtain"