Support Vectorize for Tables - Insert and Read (sort)

[amorton]

Initial design will allow passing a string as the value for a vector column

{
"my_vector" : "I like cheese", 
}

If the column is a vector column && it has vectorize defined we can vectorize it.

We also need to support this for sorting, so if the command has

"sort" : {"my_vector" : "i like cheese"},

we should also vectorise that.

[amorton]

@Yuqi-Du handing over to you for errors and tests and discussed.