feat(kiro): add AWS Builder ID authentication support

- Add --kiro-aws-login flag for AWS Builder ID device code flow
- Add DoKiroAWSLogin function for AWS SSO OIDC authentication
- Complete Kiro integration with AWS, Google OAuth, and social auth
- Add kiro executor, translator, and SDK components
- Update browser support for Kiro authentication flows

internal/translator/kiro/claude/kiro_claude.go

@@ -0,0 +1,24 @@
+// Package claude provides translation between Kiro and Claude formats.
+// Since Kiro uses Claude-compatible format internally, translations are mostly pass-through.
+package claude
+
+import (
+	"bytes"
+	"context"
+)
+
+// ConvertClaudeRequestToKiro converts Claude request to Kiro format.
+// Since Kiro uses Claude format internally, this is mostly a pass-through.
+func ConvertClaudeRequestToKiro(modelName string, inputRawJSON []byte, stream bool) []byte {
+	return bytes.Clone(inputRawJSON)
+}
+
+// ConvertKiroResponseToClaude converts Kiro streaming response to Claude format.
+func ConvertKiroResponseToClaude(ctx context.Context, model string, originalRequest, request, rawResponse []byte, param *any) []string {
+	return []string{string(rawResponse)}
+}
+
+// ConvertKiroResponseToClaudeNonStream converts Kiro non-streaming response to Claude format.
+func ConvertKiroResponseToClaudeNonStream(ctx context.Context, model string, originalRequest, request, rawResponse []byte, param *any) string {
+	return string(rawResponse)
+}