**Use case**

Viewing binary data such as bitmasks, hashes, internal representation of IEEE-754 numbers, etc.
Mostly for debugging.

**Describe the solution you'd like**

Similar to `hex`/`unhex`.

`bin` - returns a string with `0` and `1`. Bits are in "human" order, most significant first. Most significant zero bits are not printed (except the case with single zero).

**Describe alternatives you've considered**

Now I have to run interactive `python` from command line, but I will be more happy using ClickHouse.

**Caveats**

The name `bin` may suggest that the function will "split data into bins" but it is completely unrelated.
ColumnNumbers getArgumentsThatAreAlwaysConstant() const override { return {1, 2}; }
    ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t ) const override
    {
        const auto & col_type_name = arguments[0];
        const ColumnPtr & column = col_type_name.column;
        const auto & col_ipv6_zeroed_tail_bytes_type = arguments[1];
        const auto & col_ipv6_zeroed_tail_bytes = col_ipv6_zeroed_tail_bytes_type.column;
        const auto & col_ipv4_zeroed_tail_bytes_type = arguments[2];
        const auto & col_ipv4_zeroed_tail_bytes = col_ipv4_zeroed_tail_bytes_type.column;
        if (const auto * col_in = checkAndGetColumn<ColumnFixedString>(column.get()))
        {
            if (col_in->getN() != IPV6_BINARY_LENGTH)
                throw Exception("Illegal type " + col_type_name.type->getName() +
                                " of column " + col_in->getName() +
                                " argument of function " + getName() +
                                ", expected FixedString(" + toString(IPV6_BINARY_LENGTH) + ")",
                                ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);