v2.0.1

Docs-only patch. Repositions the repo as a portable agent skill (not Claude-specific) and adds project-level contributor
documentation.

Added

• AGENTS.md at the repo root: project-level instructions for agents working inside the repo. YAML frontmatter (name,
  description, repository, license, verified-against), bundle conventions (VERSION pin discipline,
  wait_until=networkidle default, PEP 723 scripts, schema-generation fixture contract), repo conventions
  (main-protected branch discipline, Conventional Commits, dual-license acceptance), testing command, quality bar, and a
  "When NOT to edit" block.
• CONTRIBUTING.md at the repo root: minimal contributor flow covering issue filing, branch naming, testing, PR
  conventions, and scope bounding (upstream Crawl4AI library bugs route to the upstream repo, not this one).

Changed

• README.md overhauled for portable agent-skill framing. Title becomes Crawl4AI Agent Skill. Lead paragraph names
  the agent-host audience explicitly (Claude Code, Codex, Cursor, OpenCode, Cline, and other SKILL.md-format hosts).
• Install section: single host-agnostic git clone <repo> <host-skills-dir>/crawl4ai path, illustrated with the Claude
  Code path. Claude Desktop staging-dir zip flow removed.
• Documentation section now links all nine reference guides.
• Adds a Bundle layout table documenting SKILL.md, references/, scripts/, templates/, evals/, fixtures/,
  tests/, and the VERSION pin.
• Marketplace and Support sections removed.