Add Trino platform with engine-only integration tests

[JunWang222]

Summary

This PR adds the Wayang Trino platform implementation and engine-only integration tests.

What is included

• Adds wayang-trino platform module.
• Adds Trino mappings/operators for:
  • TableSource
  • Filter
  • Projection
  • Join
  • GlobalReduce
  • ReduceBy
  • Sort
  • TableSink
• Adds end-to-end TrinoOperatorsIT coverage for each operator.
• Adds JavaPlanBuilder integration tests that simulate user-facing API usage.
• Keeps the integration tests engine-only by registering only Trino.plugin().
• Uses self-contained test fixtures created by the test setup, without requiring external datasets.

Validation

• Rebased on latest apache/wayang:main.
• Trino operator tests are designed to run against the local Trino setup and skip when Trino is unavailable.

[zkaoudi]

Thank you for Jun. Can you do the following structural changes:

1. create a root folder platforms-setup-guides
2. move the "trino-setup" inside the above folder

[zkaoudi]

Also, what does the the demo.sh demonstrate? Maybe we should also place it in another folder instead of having it in the root of the project.

[zkaoudi]

sorry, I meant the demo-trino.sh