Add clear type annotations and interaction records

[LukasBuschmann]

Summary

• add explicit type annotations across structure preparation, detection, reporting, visualization, CLI, and tests
• replace anonymous interaction tuples with descriptive NamedTuple records while retaining the historical aliases
• make shared interaction and structure records explicit in plip/structure/records.py
• align the declared Python requirement with the syntax and dependency baseline (>=3.10)

This is intended as a typing and representation refactor without changes to interaction-detection semantics.

Testing

python -m unittest discover -s . -p "test_*.py"

Baseline comparison in the same Python 3.12 environment:

• master: 74 tests, 29 failures, 1 error, 1 skipped
• this branch: 75 tests, 29 failures, 1 error, 1 skipped

The existing failures are unchanged; this change introduces no additional failing test. Test-suite corrections are intentionally being handled separately.