feat: one-command install script and --version flag

[aniketmaurya]

Summary

• Add scripts/install.sh — single-command installer: curl -sSL https://celesto.ai/install.sh | bash
• Installs uv if needed, installs smolvm via uv tool install, runs smolvm setup, and verifies with smolvm doctor
• Safe to re-run: reuses existing uv, upgrades smolvm if already installed as a uv tool
• Add smolvm --version / smolvm -V CLI flag

Test plan

• Run bash scripts/install.sh on a clean Linux machine
• Run bash scripts/install.sh on macOS with uv already installed
• Run bash scripts/install.sh twice to verify idempotency
• Run bash scripts/install.sh --with-docker to verify flag forwarding
• Verify smolvm --version prints the correct version

🤖 Generated with Claude Code

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: b2877153-6af0-4dc6-a87d-5951b04a55cd

📥 Commits

Reviewing files that changed from the base of the PR and between 2a9ee07 and bed9612.

📒 Files selected for processing (4)

• scripts/install.sh
• src/smolvm/cli.py
• src/smolvm/facade.py
• tests/test_facade.py

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/install-script

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