arrow

ARROW-2909: [JS] Add convenience function for creating a table from a list of vectors

Simplifies the creation of a `Table` from JS Arrays:

```js
const LENGTH = 20000;

const idVec = Arrow.vector.IntVector.from(
  Uint32Array.from({length: LENGTH}, () => Math.round(Math.random() * 2E9))
);
const latVec = Arrow.vector.FloatVector.from(
  Float32Array.from({length: LENGTH}, () => Number((Math.random() * 180 - 90).toFixed(1)))
);
const lngVec = Arrow.vector.FloatVector.from(
  Float32Array.from({length: LENGTH}, () => Number((Math.random() * 360 - 180).toFixed(1)))
);

const table = Arrow.Table.fromVectors([idVec, latVec, lngVec], ['id', 'lat', 'lng'])

onsole.log(table.schema.fields.map((f) => f.name));
// [ 'id', 'lat', 'lng' ]

console.log(table.schema.fields.map((f) => f.type));
// [ Uint32 [Int] { TType: 2, children: undefined, isSigned: false, bitWidth: 32 },
//   Float32 [Float] { TType: 3, children: undefined, precision: 1 },
//   Float32 [Float] { TType: 3, children: undefined, precision: 1 } ]
```

Author: Brian Hulette <hulettbh@gmail.com>

Closes #2322 from TheNeuralBit/from-vectors and squashes the following commits:

12b4c286 <Brian Hulette> Update "Table from JS Arrays" example
cfc4948a <Brian Hulette> Use Table.fromVectors in table-tests
f6551a3e <Brian Hulette> Add convenience function for constructing a Table from a list of Vectors