feat: nested fields

[rmarganti]

Changes

• Adds support for filtering on nested fields in @filter-def/in-memory and @filter-def/bigquery packages
• errors for @filter-def/drizzle, due to driver-specific implementations. For now, we are driver agnostic.

Example (BigQuery):

interface UserWithAddress {
    name: { first: string; last: string };
    address: { city: string; geo: { lat: number; lng: number } };
}

const userFilter = bigqueryFilter<UserWithAddress>().def({
    firstName: { kind: "eq", field: "name.first" },
    lat: { kind: "eq", field: "address.geo.lat" },
});

const where = userFilter({ firstName: 'Bob', lat: 25 });
// {
//     sql: 'name.first = @firstName AND address.geo.lat = @lat',
//     params: { firstName: 'Bob', lat: 21 },
// }