Add 'Cbowcryptex' to README

[Cbowcrptex]

H

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Note

Low Risk
Documentation-only change to README.md with no code or behavior impact; low risk aside from minor formatting/newline churn.

Overview
Adds the string Cbowcryptex near the top of README.md.

Also adjusts trailing formatting at the end of the file (adds a final ---/newline).

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