Changes have been kept to a minimum, but a serious chunk of work was
needed to move from 8266isms to IDFisms.
Some things got refactored into components/lua/common, in particular
the LFS location awareness.
As part of this work I also evicted our partition table manipulation
code, as with the current IDF it kept breaking checksums and rendering
things unbootable, which is the opposite of helpful (which was the
original intent behind it).
The uart module got relocated from base_nodemcu to the modules component
properly, after I worked out how to force its inclusion using Kconfig alone.
* Adding qrcodegen module for generating QR Codes
* Added LUA_MODULE_QRCODEGEN KConfig
* Changed qrcodegen.encodeText() to use an options table
Created common.h with new option table helper fns.
* Reworked http.c to use new common.h options table APIs
Johny Mattsson
Johny Mattsson
Javier Peletier
tomsci