Feature/refactor items

[ShishkinDmitriy]

I tried to rename methods from up/down/left/right into specific for item, something like more 'domain specific':

• changeScreen for ItemBack and ItemSubMenu insted of enter.
• commitCharEdit for ItemInputCharset instead of enter.

Also signature of process simplified and instead of Context pass only LcdMenu and char.
All required dependencies (display and current screen) can be obtained from menu.

Also true/false result for process method is controlled inside process method. Also simplified repeated if's

Also need somehow separate value update and draw.

[github-actions]

Memory usage change @ 742f050

Board	flash	%	RAM for global variables	%
arduino:avr:uno	💚 -336 - -40	-1.04 - -0.12	💚 -8 - -2	-0.39 - -0.1

Click for full report table

Board	examples/Basic flash	%	examples/Basic RAM for global variables	%	examples/Callbacks flash	%	examples/Callbacks RAM for global variables	%	examples/CharsetInput flash	%	examples/CharsetInput RAM for global variables	%	examples/DigitalInputAdapter flash	%	examples/DigitalInputAdapter RAM for global variables	%	examples/DigitalInputWithRotaryAdapter flash	%	examples/DigitalInputWithRotaryAdapter RAM for global variables	%	examples/InputRotary flash	%	examples/InputRotary RAM for global variables	%	examples/IntFloatValues flash	%	examples/IntFloatValues RAM for global variables	%	examples/ItemBack flash	%	examples/ItemBack RAM for global variables	%	examples/KeyboardAdapter flash	%	examples/KeyboardAdapter RAM for global variables	%	examples/List flash	%	examples/List RAM for global variables	%	examples/MenuTimeout flash	%	examples/MenuTimeout RAM for global variables	%	examples/RTOS flash	%	examples/RTOS RAM for global variables	%	examples/SimpleInput flash	%	examples/SimpleInput RAM for global variables	%	examples/SimpleRotary flash	%	examples/SimpleRotary RAM for global variables	%	examples/SubMenu flash	%	examples/SubMenu RAM for global variables	%
arduino:avr:uno	-44	-0.14	-2	-0.1	-52	-0.16	-4	-0.2	-300	-0.93	-4	-0.2	-40	-0.12	-4	-0.2	-336	-1.04	-8	-0.39	-328	-1.02	-8	-0.39	-128	-0.4	-4	-0.2	-72	-0.22	-6	-0.29	-300	-0.93	-4	-0.2	-118	-0.37	-4	-0.2	-44	-0.14	-2	-0.1	-72	-0.22	-6	-0.29	-146	-0.45	-4	-0.2	-188	-0.58	-8	-0.39	-64	-0.2	-4	-0.2

Click for full report CSV

Board,examples/Basic<br>flash,%,examples/Basic<br>RAM for global variables,%,examples/Callbacks<br>flash,%,examples/Callbacks<br>RAM for global variables,%,examples/CharsetInput<br>flash,%,examples/CharsetInput<br>RAM for global variables,%,examples/DigitalInputAdapter<br>flash,%,examples/DigitalInputAdapter<br>RAM for global variables,%,examples/DigitalInputWithRotaryAdapter<br>flash,%,examples/DigitalInputWithRotaryAdapter<br>RAM for global variables,%,examples/InputRotary<br>flash,%,examples/InputRotary<br>RAM for global variables,%,examples/IntFloatValues<br>flash,%,examples/IntFloatValues<br>RAM for global variables,%,examples/ItemBack<br>flash,%,examples/ItemBack<br>RAM for global variables,%,examples/KeyboardAdapter<br>flash,%,examples/KeyboardAdapter<br>RAM for global variables,%,examples/List<br>flash,%,examples/List<br>RAM for global variables,%,examples/MenuTimeout<br>flash,%,examples/MenuTimeout<br>RAM for global variables,%,examples/RTOS<br>flash,%,examples/RTOS<br>RAM for global variables,%,examples/SimpleInput<br>flash,%,examples/SimpleInput<br>RAM for global variables,%,examples/SimpleRotary<br>flash,%,examples/SimpleRotary<br>RAM for global variables,%,examples/SubMenu<br>flash,%,examples/SubMenu<br>RAM for global variables,%
arduino:avr:uno,-44,-0.14,-2,-0.1,-52,-0.16,-4,-0.2,-300,-0.93,-4,-0.2,-40,-0.12,-4,-0.2,-336,-1.04,-8,-0.39,-328,-1.02,-8,-0.39,-128,-0.4,-4,-0.2,-72,-0.22,-6,-0.29,-300,-0.93,-4,-0.2,-118,-0.37,-4,-0.2,-44,-0.14,-2,-0.1,-72,-0.22,-6,-0.29,-146,-0.45,-4,-0.2,-188,-0.58,-8,-0.39,-64,-0.2,-4,-0.2