Support QBit data type (25.10)

[slvrtrn]

Website docs: https://clickhouse.com/docs/sql-reference/data-types/qbit

Internal layout: https://github.com/ClickHouse/ClickHouse/pull/87922/files#diff-9d45fe76d9e7f9a392db684d3465aff14979cfc9bbe5ccd912e9307a934bd28aR15-R51

Given QBit(element_type, dimension) where element_type is one of BFloat16, Float32, Float64, it is internally represented as a Tuple of FixedString(dimension).

• The length of the Tuple depends on the element_type
  • BFloat16 = 16
  • Float32 = 32
  • Float64 = 64
• Requires allow_experimental_qbit_type setting

[vwency]

Can I try it? I’ve already done a code review, and I can implement it

[abonander]

@vwency if you'd like to open a PR I'd be happy to take a look at it.