resistor-color: avoid incorrect analysis for object-literal solutions

[samirhssn]

Summary

Avoids producing misleading analyzer feedback when solutions use
object-literal access patterns that the resistor-color analyzer does
not explicitly recognize.

Details

The analyzer currently attempts to classify object-based solutions even
when they do not match the canonical patterns it understands, which can
result in confusing or incorrect comments.

This change makes the analyzer conservative in those cases and skips
judgement rather than guessing.

Motivation

This aligns with the discussion in #127 and follows Exercism’s principle
of avoiding misleading feedback when analysis is uncertain.

[github-actions]

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[samirhssn]

I’ve opened a Community Forum discussion as requested:
https://forum.exercism.org/t/proposal-make-resistor-color-analyzer-conservative-for-object-literal-solutions/20527

Please let me know if this proposal is approved so the PR can be reopened.