feat: Add new tile accessor to get at tile props

[eonarheim]

Based on this conversation excaliburjs/Excalibur#2673

We want a convenient way to get at custom tile properties!

// Grab tiles by worldspace point and the named layer
const tile = map.getTileByPoint('Ground', evt.worldPos);
// or by coordinate
const tile = map.getTileByCoordiante('Ground, 10, 100);

console.log('tile', tile);
console.log('id', tile?.id);
console.log('tile props', tile?.properties);