RAGFlow go API server (#13240)

# RAGFlow Go Implementation Plan 🚀

This repository tracks the progress of porting RAGFlow to Go. We'll
implement core features and provide performance comparisons between
Python and Go versions.

## Implementation Checklist

- [x] User Management APIs
- [x] Dataset Management Operations
- [x] Retrieval Test
- [x] Chat Management Operations
- [x] Infinity Go SDK

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>
Co-authored-by: Yingfeng Zhang <yingfeng.zhang@gmail.com>

internal/cpp/opencc/utils.h

@@ -0,0 +1,71 @@
+/*
+ * Open Chinese Convert
+ *
+ * Copyright 2010 BYVoid <byvoid.kcp@gmail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __OPENCC_UTILS_H_
+#define __OPENCC_UTILS_H_
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "opencc_types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FALSE (0)
+#define TRUE (!(0))
+#define INFINITY_INT ((~0U) >> 1)
+
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN (0)
+#endif
+
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN (1)
+#endif
+
+#ifdef ENABLE_GETTEXT
+#include <libintl.h>
+#include <locale.h>
+#define _(STRING) dgettext(PACKAGE_NAME, STRING)
+#else
+#define _(STRING) STRING
+#endif
+
+#define debug_should_not_be_here()                                                                                                                   \
+    do {                                                                                                                                             \
+        fprintf(stderr, "Should not be here %s: %d\n", __FILE__, __LINE__);                                                                          \
+        assert(0);                                                                                                                                   \
+    } while (0)
+
+void perr(const char *str);
+
+int qsort_int_cmp(const void *a, const void *b);
+
+char *mstrcpy(const char *str);
+
+char *mstrncpy(const char *str, size_t n);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* __OPENCC_UTILS_H_ */