docs: add evil-keys crate implementation plan

Comprehensive design document covering architecture, API surface, dispatch
algorithm, integration steps, testing strategy with 106 test cases, and
design decisions (shift normalization, conflict detection, count overflow).

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
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Alexander
2026-05-10 10:59:53 +02:00
parent 1c1dadf5cd
commit eb114fc614
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