Saves ~100bytes in RAM

* Add support for Yagusmart 1, 2 ad 3 gang switches

https://www.amazon.co.uk/gp/product/B086MV5MC8

These don't come with an esp8266 anymore, but can be trivially converted
as the new chip is pin compatible. Note, GPIO15 needs to be connected to
GND on 1 and 2 gang switches in order to enable the ESP to boot.

* Update code/platformio.ini

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

* Adjust build flags and name to be conformant to project culture and conventions

* changelog

* sorting

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

amend code to work with both i2c addresses as per datasheet https://dfimg.dfrobot.com/nobody/wiki/88b31350da4f54d00989c74c6fa392f7.pdf

* Add SERIAL_SENSOR support

* Implement "MQTT.SEND" command, remove all other commands (#2477)

* Move command to mqtt.cpp and drop extra files

* Update CHANGELOG.md

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

Immediatly try to connect when reloading settings and previous attempt
had failed. Because of locking, previously this caused a soft-lock of the
internal loop that required waiting for the long Reconnect timeout to
expire first.

Refactor the module to include namespace { ... } and move build settings into .cpp
Saves ~1.5Kb and also allows gcc to issue unused warnings for declared functions.

As a side-effect of refactoring, (temporarily?) remove softAp leases support.
Current Core moved dhcps support into a C++ code, forcing internal logic
to reference a specific object. Better to wait a bit until that
stabilizes and try again. Plus, it is not currently available in the esp-idf.

Sync changelog with recent changes
Codacy is no longer running (...pending viable config for clang-tidy, etc.)
Some of the features were only in wiki

* Version 1.15.0-dev

* changelog

* changelog

* Version 1.14.1

* fix autoreplace

* formatting

* sensor: add DHT_CHIP_SI7021 references

* sensor: update DHT_TYPE definitions, use enum

* changelog

- add experimental `relayDummy` to configure dummy relays at runtime
- add tuya-generic-dimmer #1729
- cleanup broker interface to allow Tuya module to properly receive events, modify broker methods to allow different function signatures
- add basic tests for Tuya frame and data protocol

* RPN rules (WIP)

* RPN rules web interface, MQTT inputs

* Stickyness, rpn.ops,...

* Perform light updates only when value changes

* Improve wsSend performance

* Revert PR test

* Check TERMINAL_SUPPORT for _rpnInitCommands and remove unused variable

* Fix merge

* formatting

* disable by default (?)

* changelog

* comment

* remove debug function wrappers in favour of var activation

* fixup! comment

* 1.13.6-dev: changelog so far

* try markdown links

* try2 to keep commit urls

* credits, sub-categories (since we have a lot of things for patch release...)

* consistent use of md bold text

One line duplicated