I tried the codebase against the new esp-idf 4 alpha code, and
the build didn't have exception handling enabled by default.
I saw no problems with modifying the code to not raise exceptions,
so I did so to be future-proof.

The exception cases were cases that should not happen anyway,
because the input that could trigger the exception has already
been validated on beforehand by the Python-based code generation.

Fixes #10
"When changing RGB color settings, while night light mode is active,
transitions don't look good. On many of the transitions, the light
level shows a significant drop."

This commit fully suppresses transitions when the light is in
night light mode.

Documentation and binary sensor code quality improvements.

Implemented support for presets.

Some people wanted to buy me beer, coffee and the like as a thank you for the work that I put into the ESPHome firmware code for the Xiaomi Mijia Bedside Lamp 2. Well, I don't say no to a beer, cheers! ;-)