Record accessors

[tchak]

This is an iteration over #240 and #241. I think ultimately we could deprecate almost all of store/cache finder methods.

store.record({ type: 'planet', id: '1' }).peek();
await store.record({ type: 'planet', id: '1' }).query();
await store.record({ type: 'planet', id: '1' }).remove();
await store.record({ type: 'planet', id: '1' }).update({ name: 'Earth' });

store.records('planet').peek();
store.records('planet').filter({ attribute: 'name', value: 'Earth' }).peek();
store.records('planet').filter({ attribute: 'name', value: 'Earth' }).raw();
store.records('planet').filter({ attribute: 'name', value: 'Earth' }).live();
await store.records('planet').query();
await store.records('planet').filter({ attribute: 'name', value: 'Earth' }).query();
await store.records('planet').add({ name: 'Jupiter' });

record.relatedRecords('moons').peek();
record.relatedRecords('moons').filter({ attribute: 'name', value: 'Moon' }).peek();
record.relatedRecords('moons').filter({ attribute: 'name', value: 'Moon' }).live();
await record.relatedRecords('moons').query();
await record.relatedRecords('moons').filter({ attribute: 'name', value: 'Moon' }).query();
await record.relatedRecords('moons').add({ type: 'moon', id: '1' });
await record.relatedRecords('moons').remove({ type: 'moon', id: '1' });

• Add deprecations
• Add tests