Add rule 12 to the user-defined rules

[aabounegm]

PR-Codex overview

This PR focuses on adding a new rule in the EO Phi normalizer.

Detailed summary

• Added a new rule Rule 12 in eo-phi-normalizer/test/eo/phi/rules/yegor.yaml.
• The new rule handles the case of accessing an attribute on bottom (⊥).
• The rule pattern is ⊥.!a and the result is ⊥.
• Included tests to ensure the correctness of the rule.

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