[Doc] Have doc to clarify the difference among binding usages

[bigopon]

From @netcitylife at https://discord.com/channels/448698263508615178/448699089513611266/1020605793122385960

The question of binding to native element properties is very important and the logic of it should be finalised and described in detail in the docs before Beta. Current behavior is confusing a bit, I do not know exactly what would be the result of binding before actually trying it. There are several options now (considering all attributes, not just "id"):

1. id="${prop}"
2. id.bind="prop & attr"
3. id.bind="prop"
   ...

... Current docs do not provide detailed information about binding logic, that should be solved first, and then its implementation may be polished. Possible performance difference is also important here. Developers should make a meaningful decision what option to use in their case.