repo: add factory web interface support

components/factory/docs/web_page.png

components/factory/factory.md

components/factory/html/css/w3.css

components/factory/html/favicon.ico

components/factory/html/images/battery.png

components/factory/html/images/entity.png

components/factory/html/images/legos.png

components/factory/html/images/load_high.png

components/factory/html/images/load_low.png

components/factory/html/images/meter.svg

components/factory/html/images/tower.png

components/factory/html/index.html

components/factory/include/factory.h

components/factory/src/factory.c