[WIP] Vectorized scalar types

[artjomPlaunov]

Do not review yet, this depends on #175 going in first, and is currently just a sketch to get a feel for what we want the API to look like, before actually committing to the API + adding nested types on top of this as a subsequent PR.

// check_amount(DECIMAL(4,2), DECIMAL(38,2), TIMESTAMP) -> BOOLEAN

smallVector, _ := state.GetInputChunk().GetVector(0)
largeVector, _ := state.GetInputChunk().GetVector(1)
timeVector, _ := state.GetInputChunk().GetVector(2)

small, _ := duckdb.GetVectorView[duckdb.DecimalValue](smallVector)
large, _ := duckdb.GetVectorView[duckdb.DecimalValue](largeVector)
timestamps, _ := duckdb.GetVectorView[time.Time](timeVector)

result, _ := duckdb.GetVectorWriter[bool](state.GetResultVector())

for row := range small.Len() {
	a, aValid, _ := small.GetValue(row) // DECIMAL backed by INT16
	b, bValid, _ := large.GetValue(row) // DECIMAL backed by HUGEINT
	ts, tsValid, _ := timestamps.GetValue(row)

	if aValid && bValid && tsValid {
		_ = result.Set(row,
			a.Unscaled == b.Unscaled && ts.Year() >= 2025,
		)
	}
}