refactor(root): consolidate legacy skills into oma-* namespace and add multi-agent hooks

Remove duplicate legacy skill definitions in favor of unified oma-* prefixed skills. Add hook configurations and settings for Claude, Codex, Gemini, and Qwen agents.

Generated with oh-my-agent

Co-Authored-By: First Fluke <our.first.fluke@gmail.com>

Author: gracefullight

.agents/skills/_shared/context-budget.md …yout-v2/skills/_shared/context-budget.md.agents/skills/_shared/context-budget.md renamed to .agents/.migration-backup/shared-layout-v2/skills/_shared/context-budget.md .agents/skills/_shared/context-budget.md renamed to .agents/.migration-backup/shared-layout-v2/skills/_shared/context-budget.md

@@ -38,7 +38,7 @@ CHARTER_CHECK:
 Report findings with severity levels:
 
 ```
-## Review Result: {PASS | FAIL}
+## Review Result: {PASS | WARNING | FAIL}
 
 ### CRITICAL
 - `file:line` — description — remediation code
@@ -60,7 +60,8 @@ Report findings with severity levels:
 3. Run automated tools first (`npm audit`, lint, type-check)
 4. No false positives — verify each finding
 5. Provide remediation code, not just descriptions
-6. PASS verdict: zero CRITICAL and zero HIGH issues
-7. FAIL verdict: any CRITICAL or HIGH issue found
-8. Never modify source code — review only
-9. Never modify `.agents/` files
+6. PASS verdict: zero CRITICAL, HIGH, and MEDIUM issues
+7. WARNING verdict: zero CRITICAL and HIGH, but MEDIUM issues exist
+8. FAIL verdict: any CRITICAL or HIGH issue found
+9. Never modify source code — review only
+10. Never modify `.agents/` files