Add skill-manager skill (migrated from skill-creator) with deploy action

- Skill content moved from ~/.agents/skills/skill-creator, renamed to skill-manager
- New deploy CLI action: installs any skill via absolute-path symlinks (or copies)
  into $HOME/.agents/skills, $HOME/.claude/skills and $HOME/.cline/skills
- Taskfile + shell module wrappers (task deploy / cli:deploy)
- SKILL.md: deploy docs, origin-repository/origin-path metadata

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/.scripts/validator/lib/--env-vars-reader.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+# validate/lib/--env-vars-reader.sh — environment loading for the validate module
+# This module operates without env files (all input via CLI flags).
+# No env loading required.