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/stemmer/stem_UTF_8_french.h

@@ -0,0 +1,17 @@
+
+/* This file was generated automatically by the Snowball to ANSI C compiler */
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern struct SN_env *french_UTF_8_create_env(void);
+extern void french_UTF_8_close_env(struct SN_env *z);
+
+extern int french_UTF_8_stem(struct SN_env *z);
+
+#ifdef __cplusplus
+}
+#endif