feat: Add bootstrap script to generate skill-seekers operational skill

Add:
- scripts/bootstrap_skill.sh - Main script (uv sync, analyze)
- scripts/skill_header.md - Operational instructions header
- tests/test_bootstrap_skill.py - Pytest tests

The header contains manual instructions that can't be auto-extracted:
- Prerequisites (pip install)
- Command reference table
- Quick start examples

The script prepends this header to the auto-generated SKILL.md
which contains patterns, examples, and API docs from code analysis.

Usage:
  ./scripts/bootstrap_skill.sh
  cp -r output/skill-seekers ~/.claude/skills/

Output: output/skill-seekers/ (directory with SKILL.md)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/skill_header.md

@@ -0,0 +1,44 @@
+---
+name: skill-seekers
+description: Generate LLM skills from documentation, codebases, and GitHub repositories
+---
+
+# Skill Seekers
+
+## Prerequisites
+
+```bash
+pip install skill-seekers
+# Or: uv pip install skill-seekers
+```
+
+## Commands
+
+| Source | Command |
+|--------|---------|
+| Local code | `skill-seekers-codebase --directory ./path` |
+| Docs URL | `skill-seekers scrape --url https://...` |
+| GitHub | `skill-seekers github --repo owner/repo` |
+| PDF | `skill-seekers pdf --file doc.pdf` |
+
+## Quick Start
+
+```bash
+# Analyze local codebase
+skill-seekers-codebase --directory /path/to/project --output output/my-skill/
+
+# Package for Claude
+yes | skill-seekers package output/my-skill/ --no-open
+```
+
+## Options
+
+| Flag | Description |
+|------|-------------|
+| `--depth surface/deep/full` | Analysis depth |
+| `--skip-patterns` | Skip pattern detection |
+| `--skip-test-examples` | Skip test extraction |
+| `--ai-mode none/api/local` | AI enhancement |
+
+---
+