feat: converge dynamic plugins onto canonical homeagent-sdk

- Separate built-in plugin interface from external plugin interface
- Route dynamic plugin loading through homeagent-sdk/sdk using reflection
- Turn internal/sdk into an enhanced wrapper over canonical SDK types
- Vendor SDK repo snapshot under third_party/homeagent-sdk for stable builds
- Keep internal constructors/adapters for memory, knowledge, llm, settings
- Align dynamic QQ loading with canonical SDK chain

third_party/homeagent-sdk/hack/plugin-dev/templates/Makefile.tmpl

@@ -0,0 +1,17 @@
+# Build external Go plugin for HomeAgent
+# Usage: make          # build plugin.so
+#        make clean    # remove plugin.so
+
+PLUGIN_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
+SDK_ROOT := $(realpath $(PLUGIN_DIR)../..)
+PLUGIN_NAME := $(notdir $(realpath $(PLUGIN_DIR)))
+
+.PHONY: all clean
+
+all: plugin.so
+
+plugin.so:
+	cd $(SDK_ROOT) && go build -buildmode=plugin -o $(PLUGIN_DIR)plugin.so $(PLUGIN_DIR)
+
+clean:
+	rm -f $(PLUGIN_DIR)plugin.so

third_party/homeagent-sdk/hack/plugin-dev/templates/gitignore.tmpl

@@ -0,0 +1,2 @@
+plugin.so
+*.hmap

third_party/homeagent-sdk/hack/plugin-dev/templates/plugin.go.tmpl

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"log"
+
+	"gitcode.com/JianFeeeee/homeagent-sdk/sdk"
+)
+
+type Plugin struct {
+	name string
+	sdk  *sdk.PluginSDK
+}
+
+func NewPlugin(name string, config map[string]interface{}) (sdk.Plugin, error) {
+	return &Plugin{
+		name: name,
+	}, nil
+}
+
+func (p *Plugin) Name() string { return p.name }
+
+func (p *Plugin) Start(s *sdk.PluginSDK) error {
+	p.sdk = s
+
+	tp := p.name + "_"
+
+	s.RegisterTool(tp+"example", sdk.ToolDef{
+		Name:        tp + "example",
+		Description: "示例工具 - 请替换为实现",
+		Parameters: map[string]interface{}{
+			"type": "object",
+			"properties": map[string]interface{}{
+				"input": map[string]interface{}{"type": "string", "description": "输入参数"},
+			},
+			"required": []string{"input"},
+		},
+	}, p.handleExample)
+
+	log.Printf("[%s] plugin started", p.name)
+	return nil
+}
+
+func (p *Plugin) Stop() error {
+	return nil
+}
+
+func (p *Plugin) handleExample(args map[string]interface{}) (interface{}, error) {
+	input, _ := args["input"].(string)
+	return map[string]interface{}{
+		"echo": input,
+	}, nil
+}
+
+func main() {}

third_party/homeagent-sdk/hack/plugin-dev/templates/plugin.json.tmpl

@@ -0,0 +1,10 @@
+{
+  "name": "{{.Name}}",
+  "version": "{{.Version}}",
+  "description": "{{.Description}}",
+  "author": "{{.Author}}",
+  "license": "MIT",
+  "entry": "plugin.so",
+  "min_version": "1.0.0",
+  "tags": ["{{.Name}}"]
+}