fix: Implement interpretation of member access on tuples

[jfecher]

Description

Problem*

Resolves

Summary*

Fixes an issue in the interpreter where the interpreter would error for member access expressions on tuples. This prevented e.g. my_tuple.0.

Additional Context

Documentation*

Check one:

• [x] No documentation needed.
• [ ] Documentation included in this PR.
• [ ] [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• [x] I have tested the changes locally.
• [x] I have formatted the changes with Prettier and/or cargo fmt on default settings.