docs: refresh user-facing guide + reference for current code state

Audit pass against root AGENTS.md (regenerated 2026-05-08) and the
canonical sources in src/shared/model-requirements.ts,
src/features/team-mode/, src/cli/, src/config/schema/. Each touched file
keeps its existing tone but corrects stale facts:

- guide/overview.md: project name + dual-package transition reality
- guide/installation.md: bun-only invocation, dual oh-my-openagent /
  oh-my-opencode CLI surface, current doctor categories
- guide/orchestration.md: 11 agents, category routing through
  sisyphus-junior, background concurrency, team-mode link
- guide/agent-model-matching.md: Metis primary -> claude-sonnet-4-6
  (matches src/shared/model-requirements.ts fallback chain)
- guide/team-mode.md: full schema, member eligibility tiers, 12 team_*
  tools added when enabled
- reference/cli.md: trim to current Commander surface (install, doctor,
  run, mcp-oauth, refresh-model-capabilities, get-local-version)
- reference/configuration.md: trim to schema-driven reference, JSONC
  rules, multi-level merge order, mcp_env_allowlist user-only constraint
- reference/features.md: 5-tier hook composition counts, 3-tier MCPs,
  hashline edit, IntentGate, OpenClaw bidirectional dispatcher

Cross-cutting: every `oh-my-opencode.schema.json` URL replaced with
the canonical `oh-my-openagent.schema.json` (legacy package name in
text bodies preserved where it documents the dual-publish transition).

docs/examples/coding-focused.jsonc

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",
+  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-openagent.schema.json",
 
   // Optimized for intensive coding sessions.
   // Prioritizes deep implementation agents and fast feedback loops.

docs/examples/default.jsonc

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",
+  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-openagent.schema.json",
 
   // Balanced defaults for general development.
   // Tuned for reliability across diverse tasks without overspending.

docs/examples/planning-focused.jsonc

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-opencode.schema.json",
+  "$schema": "https://raw.githubusercontent.com/code-yeongyu/oh-my-openagent/dev/assets/oh-my-openagent.schema.json",
 
   // Optimized for strategic planning, architecture, and complex project design.
   // Prioritizes deep thinking agents and thorough analysis before execution.