feat!(core, client): prototype-based selectors and predicates

[0x009922]

Closes #213

• Makes use of selectors and predicates way more intuitive and less verbose.
• Matches the look of Rust API

Before:

await client.find
  .accounts({
    predicate: dm.CompoundPredicate.Or<dm.AccountProjectionPredicate>(
      dm.CompoundPredicate.Atom(dm.AccountProjectionPredicate.Id.Domain.Name.Atom.Contains('cert')),
      dm.CompoundPredicate.Atom(
        dm.AccountProjectionPredicate.Id.Signatory.Atom.Equals(bob.publicKey()),
      ),
    ),
    selector: dm.AccountProjectionSelector.Metadata.Key({
      key: new dm.Name('alias'),
      projection: { kind: 'Atom' },
    }),
  })
  .executeAll()

After:

await client.find
  .accounts()
  .filterWith((account) =>
    dm.CompoundPredicate.Or(
      dm.CompoundPredicate.Atom(
        account.id.domain.name.contains('cert'),
      ),
      dm.CompoundPredicate.Atom(
        account.id.signatory.equals(bob.publicKey()),
      ),
    )
  )
  .selectWith((account) => account.metadata.key(new dm.Name('alias')))
  .executeAll()