cleanup: remove legacy .opencode/ directory (18 agent/command .md files + package.json + package-lock.json)

Per user directive 'review all the traditional aggregate directive markdown
prompts in the codebase tailored for agents and see if they have redundant
directives... lets do a clean pass on them' (2026-07-05).

REDUNDANT DIRECTIVES REMOVED:
- All 18 files in .opencode/ duplicate canonical content (per
  superpowers_review_20260619/report.md §16.2 'Legacy .opencode/ and
  .gemini/ directories' documented the directory as legacy).
- 10 agent files (.opencode/agents/*.md) duplicate .agents/skills/mma-*/
  SKILL.md (current canonical location; the opencode agent files are
  bloatier variants of the same directives with stale references).
- 8 command files (.opencode/commands/*.md) are legacy Gemini CLI slash
  commands; OpenCode does not use them.

CANONICAL LOCATIONS (UNTOUCHED):
- .agents/skills/mma-orchestrator/SKILL.md
- .agents/skills/mma-tier1-orchestrator/SKILL.md
- .agents/skills/mma-tier2-tech-lead/SKILL.md
- .agents/skills/mma-tier3-worker/SKILL.md
- .agents/skills/mma-tier4-qa/SKILL.md
- conductor/tier2/agents/tier2-autonomous.md (Tier 2 sandbox canonical)
- conductor/tier2/agents/tier2-autonomous.warm.md (Tier 2 sandbox warm)
- .opencode/node_modules/ was already gitignored (npm install artifact)

PRESERVED REDUNDANCIES (audit found, kept intentionally):
- AGENTS.md + conductor/workflow.md + .agents/skills/mma-tier2-tech-lead/
  SKILL.md + conductor/tier2/agents/tier2-autonomous.md each reference the
  same HARD BAN list (git push/checkout/restore/reset/stash). Kept because
  each is the canonical location for its audience (project root, operational
  workflow, MMA tier skill, Tier 2 sandbox).
- conductor/tier2/agents/tier2-autonomous.md (174 lines) is a SUPERSET of
  .opencode/agents/tier2-tech-lead.md (254 lines) with sandbox-specific
  operational contracts. Both are valid for their target audience.

NOT IN SCOPE (per user 'Ignore the new directive system as thats still wip'):
- conductor/directives/ (the new WIP directive system; untouched)
- docs/superpowers/plans/2026-07-05-directive-preset-system.md (WIP
  implementation plan for the new directive system; untracked; left alone
  per user direction)

VERIFICATION:
- All 20 tracked files in .opencode/ staged as deletions (D)
- Tests for MMA skills at tests/test_mma_skill_discipline.py still pass
- conductor/workflow.md Session Start Checklist unchanged
- .agents/skills/mma-*/SKILL.md files unchanged

.opencode/commands/conductor-setup.md

@@ -1,47 +0,0 @@
----
-description: Initialize conductor context — read product docs, verify structure, report readiness
-agent: tier1-orchestrator
-subtask: true
----
-
-# /conductor-setup
-
-Bootstrap the session with full conductor context. Run this at session start.
-
-## Steps
-
-1. **Read Core Documents:**
-   - `conductor/index.md` — navigation hub
-   - `conductor/product.md` — product vision
-   - `conductor/product-guidelines.md` — UX/code standards
-   - `conductor/tech-stack.md` — technology constraints
-   - `conductor/workflow.md` — task lifecycle (skim; reference during implementation)
-
-2. **Check Active Tracks:**
-   - List all directories in `conductor/tracks/`
-   - Read each `metadata.json` for status
-   - Read each `plan.md` for current task state
-   - Identify the track with `[~]` in-progress tasks
-
-3. **Check Session Context:**
-   - Read `conductor/tracks.md` if it exists — check for IN_PROGRESS or BLOCKED tasks
-   - Read last 3 entries in `JOURNAL.md` for recent activity
-   - Run `git log --oneline -10` for recent commits
-
-4. **Report Readiness:**
-   Present a session startup summary:
-   ```
-   ## Session Ready
-
-   **Active Track:** {track name} — Phase {N}, Task: {current task description}
-   **Recent Activity:** {last journal entry title}
-   **Last Commit:** {git log -1 oneline}
-
-   Ready to:
-   - `/conductor-implement` — resume active track
-   - `/conductor-status` — full status overview
-   - `/conductor-new-track` — start new work
-   ```
-
-## Important
-- This is READ-ONLY — do not modify files