Introduce rgblight and various other changes

[cyclops1982]

What this does:

• Try to fix warnings around Observer in the build (it's better but still not 100%)
• Move to uicomponent directory as the code gets a lot quickly, it seems.
• introduce usage of EntityType to render various controls
• make client-lvgl accept entity with a regex pattern
• Remove scrollbars from UISwitch.
• add createLabel and allow a scrolling option to be set
• Fix UIButton to make sure the label is in the centre and can scroll
• Introduce uiEntityWidth which is a fixed width for all our UIEntity item.
• Change resolution and style flexbox elements so that it all 'flows' correctly and doesn't looked squashed together.
• Update some of the events we're listening on, so that we are a bit more efficient.
• Add uirgblight which supports some color modes, but not WHITE, RGBW and RGBWW. Arguably this control is not 100% done as it doesn't do exactly what the light control in HA does, however, we need some major work to get to that point, which we don't want to do on this branch.
• Introduce a mutex that needs to be used in the uiupdate()
• introduced uidummy to at least render something if we don't have a control.

The uiEntityWidth and flexbox changes should allow us to just keep adding uielements with a fixed with. You'll get multiple columns eventually. This gets quite close to what HA lovelace does by itself. The uielement can decide it's height.

Issues with this branch (that will we decided not to handle):

• The parsing of json is all over the UIcontrols
• The uirgblight control doesn't support all color modes
• We don't clean up any memory, we're assuming that cleaning up memory is done by removing the power from the RAM
• The logic to map a domain to a control is super basic and more dummy code then what we have in mind. The 'fan' was added just as a demonstration to make sure we still have a 'button' to show. This allows us to demonstrate all our controls.

[Habbie]

• The parsing of json is all over the UIcontrols

• The uirgblight control doesn't support all color modes

• We don't clean up any memory, we're assuming that cleaning up memory is done by removing the power from the RAM

• The logic to map a domain to a control is super basic and more dummy code then what we have in mind. The 'fan' was added just as a demonstration to make sure we still have a 'button' to show. This allows us to demonstrate all our controls.

These should all get FIXME comments so we don't forget.