[chore]: Move the ksail plugin to devantler-tech/agent-plugins

### User Story

**As a** maintainer of devantler-tech software,
**I want** to move the ksail agent plugins to devantler-tech/agent-plugins,
**So that** all my distributed plugins are shared from one home.

### Acceptance Criteria

- [ ] Criteria 1: claude plugin and copilot plugins is moved to devantler-tech/agent-plugins
- [ ] Criteria 2: whether the ksail plugins should be merged into an existing plugins is considered and decided
- [ ] Criteria 3: whether the ksail plugins should be reworked in the process is considered and decided

Start by inventorying the ksail Claude and Copilot plugins and reviewing existing plugins in devantler-tech/agent-plugins. Decide whether they should be merged or reworked, then move them to the target repository and verify that all three acceptance criteria are addressed.

Written by the indexing model from the issue text.