VTherm over valve, Window bypass, SK language, etc ...

Release content

This release contains many exciting improvemens suggered by the community:

1. Add a new type of VTherm to control directly the valve of a TRV - #131
2. Add a window bypass to allow heating when window is open - #138 (Thanks to @adi90x),
3. size of climate entities in database - #137 (thanks to @maia),
4. add the Slovake language - #135 (thanks to @misa1515),

Bug fixes

1. VT thinks that all TRVs are turned off and must be turned on at startup - #136 (thanks to @Ra72xx)

In this release, @adi90x and @misa1515 make their first contributions 🥇 👍