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>

assets/SKILL-template.md

@@ -0,0 +1,68 @@
+---
+name: skill-name
+description: >
+  [What the skill does — be specific about capabilities].
+  Use this skill when [specific trigger conditions — user intent, task type, domain],
+  even if the user doesn't explicitly mention [domain keywords].
+license: Proprietary
+metadata:
+  author: workspace-swiss-knife
+  version: "1.0"
+# compatibility: Designed for Cline, Claude Code, GitHub Copilot, OpenAI Codex, and other compatible agents (uncomment if needed)
+# allowed-tools: Bash Read Write (uncomment if needed)
+---
+
+# [Skill Title]
+
+[One-sentence summary of what this skill does and for whom.]
+
+## Overview
+
+[2–3 sentences of context. What problem does this skill solve? What domain does it operate in?]
+
+## Prerequisites
+
+[List any tools, packages, env vars, or conditions required. Remove section if none.]
+
+- Requires: `tool-name`
+- Environment: `ENV_VAR=value`
+
+## Available scripts
+
+[List scripts if any. Remove section if no scripts/ directory.
+Convention: Taskfile.yml is always required when scripts/ exists.
+Shell scripts → scripts/.scripts/<domain>/api/ (Taskfile → api → lib modules)
+Other languages → scripts/src/]
+
+Run via Taskfile (preferred):
+```bash
+cd scripts && task <action> -- --flag=value
+```
+
+- **`scripts/Taskfile.yml`** — Entry point; maps tasks to `.scripts/<domain>/` modules
+- **`scripts/.scripts/<domain>/api/<action>--<sub>.sh`** — [what it does]
+- **`scripts/src/process.py`** — [what it does]
+
+## Workflow
+
+[Step-by-step instructions. Be prescriptive for fragile steps; flexible for steps with valid alternatives.]
+
+1. [Step one]
+2. [Step two]
+3. [Step three]
+
+## Gotchas
+
+[Non-obvious facts the agent will get wrong without being told. This is the highest-value section.
+Delete this section if you have no gotchas yet — add them as you discover them.]
+
+- [Specific fact that defies reasonable assumptions]
+- [Another non-obvious environment-specific detail]
+
+## References
+
+[Tell the agent when to load each reference file. Use conditional loading, not generic "see references/".
+Delete this section if no references/ directory.]
+
+- Read `references/api-errors.md` if the API returns a non-200 status code.
+- Read `references/schema.md` before writing any database queries.