feat: complete OpenCode plugin support with hooks, tools, and commands

Major OpenCode integration overhaul:

- llms.txt: Comprehensive OpenCode documentation for LLMs (642 lines)
- .opencode/plugins/ecc-hooks.ts: All Claude Code hooks translated to OpenCode's plugin system
- .opencode/tools/*.ts: 3 custom tools (run-tests, check-coverage, security-audit)
- .opencode/commands/*.md: All 24 commands in OpenCode format
- .opencode/package.json: npm package structure for opencode-ecc
- .opencode/index.ts: Main plugin entry point

- Delete incorrect LIMITATIONS.md (hooks ARE supported via plugins)
- Rewrite MIGRATION.md with correct hook event mapping
- Update README.md OpenCode section to show full feature parity

OpenCode has 20+ events vs Claude Code's 3 phases:
- PreToolUse → tool.execute.before
- PostToolUse → tool.execute.after
- Stop → session.idle
- SessionStart → session.created
- SessionEnd → session.deleted
- Plus: file.edited, file.watcher.updated, permission.asked, todo.updated

- 12 agents: Full parity
- 24 commands: Full parity (+1 from original 23)
- 16 skills: Full parity
- Hooks: OpenCode has MORE (20+ events vs 3 phases)
- Custom Tools: 3 native OpenCode tools

The OpenCode configuration can now be:
1. Used directly: cd everything-claude-code && opencode
2. Installed via npm: npm install opencode-ecc

.opencode/commands/instinct-export.md

@@ -0,0 +1,93 @@
+---
+description: Export instincts for sharing
+agent: build
+---
+
+# Instinct Export Command
+
+Export instincts for sharing with others: $ARGUMENTS
+
+## Your Task
+
+Export instincts from the continuous-learning-v2 system.
+
+## Export Options
+
+### Export All
+```
+/instinct-export
+```
+
+### Export High Confidence Only
+```
+/instinct-export --min-confidence 0.8
+```
+
+### Export by Category
+```
+/instinct-export --category coding
+```
+
+### Export to Specific Path
+```
+/instinct-export --output ./my-instincts.json
+```
+
+## Export Format
+
+```json
+{
+  "instincts": [
+    {
+      "id": "instinct-123",
+      "trigger": "[situation description]",
+      "action": "[recommended action]",
+      "confidence": 0.85,
+      "category": "coding",
+      "applications": 10,
+      "successes": 9,
+      "source": "session-observation"
+    }
+  ],
+  "metadata": {
+    "version": "1.0",
+    "exported": "2025-01-15T10:00:00Z",
+    "author": "username",
+    "total": 25,
+    "filter": "confidence >= 0.8"
+  }
+}
+```
+
+## Export Report
+
+```
+Export Summary
+==============
+Output: ./instincts-export.json
+Total instincts: X
+Filtered: Y
+Exported: Z
+
+Categories:
+- coding: N
+- testing: N
+- security: N
+- git: N
+
+Top Instincts (by confidence):
+1. [trigger] (0.XX)
+2. [trigger] (0.XX)
+3. [trigger] (0.XX)
+```
+
+## Sharing
+
+After export:
+- Share JSON file directly
+- Upload to team repository
+- Publish to instinct registry
+
+---
+
+**TIP**: Export high-confidence instincts (>0.8) for better quality shares.