Forward +page.server.ts data with automatic load

[SeppahBaws]

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Describe the feature

If you have a +page.server.ts where you are returning data and you have a +page.gql as well, then you will never have the data from the server load.

The current workaround is to manually write a PageLoad with return { ...event.data, ...(await load_MyQuery(event)) } which isn't ideal.

Whenever we have a +page.server.ts we should also add ...event.data to the return object of the generated load function.

Criticality

nice to have

[AlecAivazis]

Note to future us: we need to make sure that the generated types correctly include both parts

[AlecAivazis]

I think with the direction we're headed this is no longer needed. happy to reopen if you think its still relevant @SeppahBaws