docs(claude): add balatrobot SKILL to help in dev process

[S1M0N38]

This skill clearly defines how to:

• perform CLI actions (balatrobot [serve|api])
• read logs
• save game screenshots

---

This skill must be activated explicitly using /balatrobot in Claude code.

If you want to use it in Codex, move into ~/.codex/skills/balatrobot/SKILL.md and load it with $balatrobot

For other coding agents that support SKILL.md (see spec in https://agentskills.io/), place it in the expected location and use their way to load the balatrobot skill.

[Copilot]

Pull request overview

This PR documents a new balatrobot skill for local BalatroBot development/debugging and ensures session logs are not tracked in git.

Changes:

• Add logs/ to .gitignore so BalatroBot session logs are ignored by version control.
• Introduce .claude/skills/balatrobot/SKILL.md, a detailed runbook for starting BalatroBot via balatrobot serve, interacting with the JSON-RPC API via balatrobot api, inspecting logs under logs/<session>/, and capturing screenshots into logs/<session>/artifacts/.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
.gitignore	Ignores the logs/ directory where BalatroBot session logs are written, matching the default logs_path="logs" behavior.
.claude/skills/balatrobot/SKILL.md	Adds a Claude SKILL definition and step-by-step runbook aligning with the existing CLI/API (serve.py, api.py, manager.py, Lua endpoints), including port selection, API usage patterns, log inspection, and screenshot capture workflow.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.