feat(codeagent-wrapper): add multi-agent support with yolo mode

- Add --agent parameter for agent-based backend/model resolution
- Add --prompt-file parameter for agent prompt injection
- Add opencode backend support with JSON output parsing
- Add yolo field in agent config for auto-enabling dangerous flags
  - claude: --dangerously-skip-permissions
  - codex: --dangerously-bypass-approvals-and-sandbox
- Add develop agent for code development tasks
- Add omo skill for multi-agent orchestration with Sisyphus coordinator
- Bump version to 5.5.0

Generated with SWE-Agent.ai

Co-Authored-By: SWE-Agent.ai <noreply@swe-agent.ai>

codeagent-wrapper/main_integration_test.go

@@ -641,7 +641,6 @@ func TestRunParallelTimeoutPropagation(t *testing.T) {
 	t.Cleanup(func() {
 		runCodexTaskFn = origRun
 		resetTestHooks()
-		os.Unsetenv("CODEX_TIMEOUT")
 	})
 
 	var receivedTimeout int
@@ -650,7 +649,7 @@ func TestRunParallelTimeoutPropagation(t *testing.T) {
 		return TaskResult{TaskID: task.ID, ExitCode: 124, Error: "timeout"}
 	}
 
-	os.Setenv("CODEX_TIMEOUT", "1")
+	t.Setenv("CODEX_TIMEOUT", "1")
 	input := `---TASK---
 id: T
 ---CONTENT---