Add documentation for Microcontroller

[Desour]

• (And also fix invalid code in T-Flop example.)
• The html was autogenerated from the md (see comment).
• The images were optipnged.
• I don't know if there is more needed for https://mesecons.net.
• Btw. an example for a bug: You can make the eeprom larger using sbi(1,(1)) or sbi(1, a1).

[SmallJoker]

:+1: LGTM