feat: add Chiron agent framework with 6 agents and 5 integration skills

Complete implementation of personal productivity agent framework for Oh-My-Opencode.

## Components Added

### Agents (6 total)
- Primary agents: chiron (Plan Mode), chiron-forge (Build Mode)
- Subagents: hermes (work communication), athena (work knowledge), apollo (private knowledge), calliope (writing)

### System Prompts (6 total)
- prompts/chiron.txt - Main orchestrator with delegation logic
- prompts/chiron-forge.txt - Execution/build counterpart
- prompts/hermes.txt - Basecamp, Outlook, MS Teams specialist
- prompts/athena.txt - Outline wiki/documentation specialist
- prompts/apollo.txt - Obsidian vault/private notes specialist
- prompts/calliope.txt - Writing/documentation specialist

### Integration Skills (5 total)
- skills/basecamp/SKILL.md - 63 MCP tools documented
- skills/outline/SKILL.md - Wiki/document management
- skills/msteams/SKILL.md - Teams/channels/meetings
- skills/outlook/SKILL.md - Email/calendar/contacts
- skills/obsidian/SKILL.md - Vault/note management

### Validation
- scripts/validate-agents.sh - Agent configuration validation
- All agents validated: JSON structure, modes, prompt references
- All prompts verified: Exist, non-empty, >500 chars
- All skills verified: Valid YAML frontmatter, SKILL.md structure

## Verification
✅ 6 agents in agents.json
✅ All 6 prompt files exist and non-empty
✅ All 5 skills have valid SKILL.md with YAML frontmatter
✅ validate-agents.sh passes (exit 0)

Co-authored-by: Sisyphus framework <atlas@opencode.dev>

.sisyphus/boulder.json

@@ -0,0 +1,9 @@
+{
+  "active_plan": "/home/m3tam3re/p/AI/AGENTS/.sisyphus/plans/chiron-agent-framework.md",
+  "started_at": "2026-02-03T19:07:36.011Z",
+  "session_ids": [
+    "ses_3db18d3abffeIjqxbVVqNCz5As",
+    "ses_3db16c6daffeKLCdiQiDREMZ3C"
+  ],
+  "plan_name": "chiron-agent-framework"
+}