feat(database): add option to get underlaying query for property relation

[laylatichy]

pr to add option to have similar behavior to laravels author->books() to get underlying query for property relation we can chain into

// select with constraints
$author->query('books')->select()->whereField(field: 'title', value: 'Timeline Taxi')->all();
$author->query('books')->select()->limit(limit: 5)->all();

// count
$author->query('books')->count()->execute();

// update scoped to relation
$author->query('books')->update(title: 'Updated')->execute();

// delete scoped to relation
$author->query('books')->delete()->execute();

works with all relation types:

// HasMany / HasOne
$author->query('books')->select()->all();
$book->query('isbn')->select()->first();

// BelongsTo
$book->query('author')->select()->first();

// HasManyThrough / HasOneThrough
$tag->query('reviewers')->select()->all();
$tag->query('topReviewer')->select()->first();

// BelongsToMany
$tag->query('books')->select()->all();

now, I wasnt sure about naming it but opted in for query since it returns querybuilder same as query() helper just scoped to model property

[github-actions]

Benchmark Results

Comparison of feat-add-option-to-get-underlaying-query-for-property against 3.x (6c8b9fefdf1a7c7cde6cecdfe9ae902883cc05c7).

Open to see the benchmark results

Benchmark	Set	Mem. Peak	Time	Variability
ViewRenderBench(benchExpressions)	-	24.517mb 0.00%	560.933μs +5.88%	±1.61% -28.58%

_{Generated by phpbench against commit ceec41c}