[C++] Streaming Execution Engine `table_source` and `table_sink` usage

The objective is to provide hands on experience to the user with the recently added table options to provide much better experience in working with streaming execution engine.

The issue names no files, tests, or entry points. Start by locating the streaming execution engine material and the recently added table options in the repository, then define the scope for hands-on table_source and table_sink usage guidance. Done should provide clear examples covering both options.

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