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/re2/perl_groups.cc

@@ -0,0 +1,118 @@
+// GENERATED BY make_perl_groups.pl; DO NOT EDIT.
+// make_perl_groups.pl >perl_groups.cc
+
+#include "re2/unicode_groups.h"
+
+namespace re2 {
+
+static const URange16 code1[] = {
+    /* \d */
+    {0x30, 0x39},
+};
+static const URange16 code2[] = {
+    /* \s */
+    {0x9, 0xa},
+    {0xc, 0xd},
+    {0x20, 0x20},
+};
+static const URange16 code3[] = {
+    /* \w */
+    {0x30, 0x39},
+    {0x41, 0x5a},
+    {0x5f, 0x5f},
+    {0x61, 0x7a},
+};
+const UGroup perl_groups[] = {
+    {"\\d", +1, code1, 1, 0, 0},
+    {"\\D", -1, code1, 1, 0, 0},
+    {"\\s", +1, code2, 3, 0, 0},
+    {"\\S", -1, code2, 3, 0, 0},
+    {"\\w", +1, code3, 4, 0, 0},
+    {"\\W", -1, code3, 4, 0, 0},
+};
+const int num_perl_groups = 6;
+static const URange16 code4[] = {
+    /* [:alnum:] */
+    {0x30, 0x39},
+    {0x41, 0x5a},
+    {0x61, 0x7a},
+};
+static const URange16 code5[] = {
+    /* [:alpha:] */
+    {0x41, 0x5a},
+    {0x61, 0x7a},
+};
+static const URange16 code6[] = {
+    /* [:ascii:] */
+    {0x0, 0x7f},
+};
+static const URange16 code7[] = {
+    /* [:blank:] */
+    {0x9, 0x9},
+    {0x20, 0x20},
+};
+static const URange16 code8[] = {
+    /* [:cntrl:] */
+    {0x0, 0x1f},
+    {0x7f, 0x7f},
+};
+static const URange16 code9[] = {
+    /* [:digit:] */
+    {0x30, 0x39},
+};
+static const URange16 code10[] = {
+    /* [:graph:] */
+    {0x21, 0x7e},
+};
+static const URange16 code11[] = {
+    /* [:lower:] */
+    {0x61, 0x7a},
+};
+static const URange16 code12[] = {
+    /* [:print:] */
+    {0x20, 0x7e},
+};
+static const URange16 code13[] = {
+    /* [:punct:] */
+    {0x21, 0x2f},
+    {0x3a, 0x40},
+    {0x5b, 0x60},
+    {0x7b, 0x7e},
+};
+static const URange16 code14[] = {
+    /* [:space:] */
+    {0x9, 0xd},
+    {0x20, 0x20},
+};
+static const URange16 code15[] = {
+    /* [:upper:] */
+    {0x41, 0x5a},
+};
+static const URange16 code16[] = {
+    /* [:word:] */
+    {0x30, 0x39},
+    {0x41, 0x5a},
+    {0x5f, 0x5f},
+    {0x61, 0x7a},
+};
+static const URange16 code17[] = {
+    /* [:xdigit:] */
+    {0x30, 0x39},
+    {0x41, 0x46},
+    {0x61, 0x66},
+};
+const UGroup posix_groups[] = {
+    {"[:alnum:]", +1, code4, 3, 0, 0},    {"[:^alnum:]", -1, code4, 3, 0, 0},  {"[:alpha:]", +1, code5, 2, 0, 0},
+    {"[:^alpha:]", -1, code5, 2, 0, 0},   {"[:ascii:]", +1, code6, 1, 0, 0},   {"[:^ascii:]", -1, code6, 1, 0, 0},
+    {"[:blank:]", +1, code7, 2, 0, 0},    {"[:^blank:]", -1, code7, 2, 0, 0},  {"[:cntrl:]", +1, code8, 2, 0, 0},
+    {"[:^cntrl:]", -1, code8, 2, 0, 0},   {"[:digit:]", +1, code9, 1, 0, 0},   {"[:^digit:]", -1, code9, 1, 0, 0},
+    {"[:graph:]", +1, code10, 1, 0, 0},   {"[:^graph:]", -1, code10, 1, 0, 0}, {"[:lower:]", +1, code11, 1, 0, 0},
+    {"[:^lower:]", -1, code11, 1, 0, 0},  {"[:print:]", +1, code12, 1, 0, 0},  {"[:^print:]", -1, code12, 1, 0, 0},
+    {"[:punct:]", +1, code13, 4, 0, 0},   {"[:^punct:]", -1, code13, 4, 0, 0}, {"[:space:]", +1, code14, 2, 0, 0},
+    {"[:^space:]", -1, code14, 2, 0, 0},  {"[:upper:]", +1, code15, 1, 0, 0},  {"[:^upper:]", -1, code15, 1, 0, 0},
+    {"[:word:]", +1, code16, 4, 0, 0},    {"[:^word:]", -1, code16, 4, 0, 0},  {"[:xdigit:]", +1, code17, 3, 0, 0},
+    {"[:^xdigit:]", -1, code17, 3, 0, 0},
+};
+const int num_posix_groups = 28;
+
+} // namespace re2