feat(autocomplete): add type generator from the php yaml definitions MONGOSH-2030

[nirinchev]

Description

Adds generators for the aggregation stages using the yaml definitions from https://github.com/mongodb-js/mongo-php-library/tree/v1.x/generator/config.

Three generators are added to process the yaml definitions:

1. schema-generator.ts generates a typescript schema from the yaml definitions which can be used to autocomplete aggregation stages. Notable limitations of the current schema include:
   • Unable to autocomplete nested fields e.g. $unset: [ 'foo.bar' ]
   • Stages following $addFields, $project, etc. will not reflect the new collection schema
   • Certain stages add variables which are not visible in the autocompletion (e.g. $lookup.let)
   • Some types don't have static schema defined (e.g. SearchScore, GeoPoint, etc.)
2. driver-schema-generator.ts generates the schema for the tests in the php yaml library. It does this by infering the schema from the documentation.
3. test-generator.ts generates tests from the yaml definitions. Those are not functional tests, but rather verify that the code compiles - that is, the schema definition does not generate false negatives. They don't attempt to verify that the autocompletion always suggests precise results though - i.e. a schema definition where everything is any would pass all the tests in this PR. Validating autocomplete results are helpful is a follow-up task that will be done when we integrate all the autocomplete tickets together.

Open Questions

We probably want to get mongodb/mongo-php-library#1659 eventually merged to ensure we don't diverge too far from upstream.

[addaleax]

Amazing work @nirinchev! ✨

[lerouxb]

Great work! Like I explained I think we probably don't need 7fc9890 anymore. Up to you if you want to remove it again.