refactor: opencode-config skill rewrite + rename /configure-opencode (#27)
* refactor: rename opencode-config to configure-opencode
- command: .opencode/commands/opencode-config.md -> configure-opencode.md
- skill dir: .opencode/skills/opencode-config/ -> configure-opencode/
- command body: skill({name: "opencode-config"}) -> skill({name: "configure-opencode"})
- project-map/README.md: update command+skill entries
* refactor: rewrite configure-opencode skill for .opencode/ auto-discovery
- flip canonical rule: config/opencode.json + bind-mount -> .opencode/opencode.json (project-local, auto-discovered, zero env var)
- repo is the template users clone (git clone && opencode)
- drop: bind-mount as primary (-> optional Docker), OPENCODE_CONFIG_DIR as required (-> power-user/Docker), Windows/ADR-009, internal env vars (ANTIDETECT/CONTEX7/CLOUDFLARE -> generic {env:MY_API_KEY})
- rename paths: config/ -> .opencode/, slaid098/opencode -> slaid098/opencode-config
- preserve: MCP/provider/permission formats, top-level keys, findLast semantic, check-permissions.py guard
- project-map: update entry descriptions for renamed command+skill
* docs(handoff): add pr-12 handoff + ADR-007
* docs(handoff): rename pr-12 handoff/ADR to pr-27 (actual PR number)
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Co-authored-by: opencode-agent <agent@slaid098.dev>