refactor(translator): remove unused log dependency and comment out debug logging

docs: add GPT-5 Codex guidelines for CLI usage

- Added detailed guidelines for GPT-5 Codex in Codex CLI.
- Expanded instructions on sandboxing, approvals, editing constraints, and style requirements.
- Included presentation and response formatting best practices.

fix(codex_instructions): update comparison logic to use prefix matching

- Changed system instructions comparison to use `strings.HasPrefix` for improved flexibility.

internal/misc/codex_instructions.go

@@ -20,7 +20,7 @@ func CodexInstructionsForModel(modelName, systemInstructions string) (bool, stri
 	// lastReviewPrompt := ""
 	for _, entry := range entries {
 		content, _ := codexInstructionsDir.ReadFile("codex_instructions/" + entry.Name())
-		if systemInstructions == string(content) {
+		if strings.HasPrefix(systemInstructions, string(content)) {
 			return true, ""
 		}
 		if strings.HasPrefix(entry.Name(), "gpt_5_codex_prompt.md") {