feat: add non-web quickstart flow and doctor checks to reduce web dependency

[rad1092]

Motivation

• Make first-success easier for solo/local users by providing a CLI-first, non-web path and quick environment checks.
• Reduce reliance on the web UI for onboarding and make model execution optional from the CLI.

Description

• Add a quickstart CLI subcommand that builds payloads interactively or from presets (insight, outlier, action) and can optionally run Ollama; implemented in bitnet_tools/cli.py as run_quickstart.
• Add a doctor CLI subcommand to quickly surface local prerequisites (python, ollama, bitnet-analyze) via run_doctor.
• Centralize payload creation in _build_payload so analyze and quickstart share consistent error handling (analysis error:).
• Update docs to prefer CLI-first flow and add BEGINNER_README.md guidance, plus package entry in pyproject.toml (bitnet-analyze console script).

Testing

• Ran unit tests with python -m pytest -q which returned 9 passed.
• Executed CLI smoke checks: python -m bitnet_tools.cli doctor (prints env status) and python -m bitnet_tools.cli quickstart --csv /tmp/qs.csv --preset insight --out /tmp/qs_payload.json which produced payload saved: ... successfully.
• Attempted automated UI snapshot with Playwright which failed with ERR_EMPTY_RESPONSE while capturing the web UI, indicating the browser check did not complete.

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[chatgpt-codex-connector]

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