docs: 修正全部文档使其与源码实现一致

- Plugin.Start(sdk *PluginSDK) 接口签名改为指针
- 方法表重写: 移除 CallLLM/QueryKnowledge/SetMemory 等不存在方法
- IOInjector 参数顺序修正为 (source, channel, text)
- 删除虚构 SDKConfig, 替换为实际 New() 构造函数签名
- .hmap 内容描述一致化 (plugin.so + plugin.dll + main.lua)
- 添加 meta/ 包元数据文件

example/qq/go.mod

@@ -0,0 +1,7 @@
+module qq
+
+go 1.25.0
+
+require gitcode.com/JianFeeeee/homeagent-sdk v0.0.0-20260708004841-e9bdcf9304b0
+
+replace gitcode.com/JianFeeeee/homeagent-sdk => ../..

example/qq/plg.json

@@ -0,0 +1,11 @@
+{
+  "name": "qq",
+  "name_zh": "QQ消息",
+  "name_en": "qq",
+  "version": "1.0.0",
+  "description": "QQ 消息收发插件，通过 NapCat 协议桥接",
+  "author": "HomeAgent",
+  "entry": "plugin.so",
+  "tags": ["qq", "messaging"],
+  "targets": "linux/amd64"
+}

example/qq/plugin.h

@@ -0,0 +1,101 @@
+/* Code generated by cmd/cgo; DO NOT EDIT. */
+
+/* package qq */
+
+
+#line 1 "cgo-builtin-export-prolog"
+
+#include <stddef.h>
+
+#ifndef GO_CGO_EXPORT_PROLOGUE_H
+#define GO_CGO_EXPORT_PROLOGUE_H
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef struct { const char *p; ptrdiff_t n; } _GoString_;
+extern size_t _GoStringLen(_GoString_ s);
+extern const char *_GoStringPtr(_GoString_ s);
+#endif
+
+#endif
+
+/* Start of preamble from import "C" comments.  */
+
+
+#line 3 "z_bridge_gen.go"
+
+#include <stdlib.h>
+int ha_dispatch(int method_id, void* core_api, char* s1, char* s2, char* s3, int i1, int i2, char** result, char** error);
+
+#line 1 "cgo-generated-wrapper"
+
+
+/* End of preamble from import "C" comments.  */
+
+
+/* Start of boilerplate cgo prologue.  */
+#line 1 "cgo-gcc-export-header-prolog"
+
+#ifndef GO_CGO_PROLOGUE_H
+#define GO_CGO_PROLOGUE_H
+
+typedef signed char GoInt8;
+typedef unsigned char GoUint8;
+typedef short GoInt16;
+typedef unsigned short GoUint16;
+typedef int GoInt32;
+typedef unsigned int GoUint32;
+typedef long long GoInt64;
+typedef unsigned long long GoUint64;
+typedef GoInt64 GoInt;
+typedef GoUint64 GoUint;
+typedef size_t GoUintptr;
+typedef float GoFloat32;
+typedef double GoFloat64;
+#ifdef _MSC_VER
+#if !defined(__cplusplus) || _MSVC_LANG <= 201402L
+#include <complex.h>
+typedef _Fcomplex GoComplex64;
+typedef _Dcomplex GoComplex128;
+#else
+#include <complex>
+typedef std::complex<float> GoComplex64;
+typedef std::complex<double> GoComplex128;
+#endif
+#else
+typedef float _Complex GoComplex64;
+typedef double _Complex GoComplex128;
+#endif
+
+/*
+  static assertion to make sure the file is being used on architecture
+  at least with matching size of GoInt.
+*/
+typedef char _check_for_64_bit_pointer_matching_GoInt[sizeof(void*)==64/8 ? 1:-1];
+
+#ifndef GO_CGO_GOSTRING_TYPEDEF
+typedef _GoString_ GoString;
+#endif
+typedef void *GoMap;
+typedef void *GoChan;
+typedef struct { void *t; void *v; } GoInterface;
+typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
+
+#endif
+
+/* End of boilerplate cgo prologue.  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int go_init_plugin(char* name, char* configJSON, char** errorOut);
+extern int go_start_plugin(void* coreAPIptr, int coreVersion, char** errorOut);
+extern int go_stop_plugin(char** errorOut);
+extern int go_invoke_tool(char* name, char* argsJSON, char** resultOut, char** errorOut);
+extern int go_invoke_stage(char* stage, char* ctxJSON, char** errorOut);
+extern int go_invoke_output(char* channel, char* msgType, char* payloadJSON, char** errorOut);
+extern void go_free_string(char* ptr);
+
+#ifdef __cplusplus
+}
+#endif