Can't use filters after RPC call

[brendanjhoffman]

Bug report

Describe the bug

A database function that returns a table called using try await client.database.rpc() returns a PostgresTransformBuilder type, which doesn't have modifiers like eq() available.

To Reproduce

Steps to reproduce the behavior, please provide code snippets or a repository:

1. Create a database function that returns a table
2. Call that database function with try await client.database.rpc()
3. Add .eq() or another modifier to the same query.
4. See error

Expected behavior

I should be able to add modifiers to a database function that returns a table; the JavaScript equivalent code works as expected.

Screenshots

Docs note that filters can be added after rpc()
https://supabase.com/docs/reference/swift/using-filters

System information

• OS: macOS
• supabase-swift 0.3.0

Additional context

This is where .rpc() in postgrest-swift returns a PostgrestTransformBuilder.

This is where .rpc() in postgrest-js returns a PostgrestFilterBuilder.