docs(ko-KR): add Korean translation for skills
- 15 skill categories (17 files): coding-standards, tdd-workflow,
frontend-patterns, backend-patterns, security-review (2 files),
postgres-patterns, verification-loop, continuous-learning,
continuous-learning-v2, eval-harness, iterative-retrieval,
strategic-compact, golang-patterns, golang-testing, clickhouse-io,
project-guidelines-example
hahmee