Allow for resolving related models

[leo]

At the moment, it is already possible to address all models at once with a single query:

get.all();
count.all();

// etc.

Those queries are helpful because they avoid needing to first resolve the list of models before being able to compose queries for the resolved models. SQLite does not provide a solution for dynamically composing queries like that either, so we integrated it into the compiler instead.

The current change applies one more improvement to those queries, by allowing for only selecting the linked models of a specific model, which would otherwise not be possible:

get.all.for('member');

Assuming that the "member" model, for example, has two link fields pointing to the models "account" and "team", then the get.all query above would only resolve the records of those two models.

The syntax is not final. The objective at the moment is to unblock our own use cases and then iterate on it further. This is also the last change of this nature that is needed (I want to keep them to a minimum).

[github-actions]

Released an experimental package:

bun add @ronin/compiler@leo-ron-1099-experimental-394

This package will be removed after the pull request has been merged.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
src/index.ts	100.00% <100.00%> (ø)
src/model/index.ts	100.00% <100.00%> (ø)