chore: replace hack with tools and remove obsolete artifacts

- Rename hack/ to tools/ for formal naming
- Update plugin development and deployment script references
- Remove obsolete DESIGN/MILESTONE/PLAN docs now superseded by docs/
- Remove abandoned internal/onebot implementation
- Ignore stray local qq binary artifact

tools/plugin-dev/templates/plugin.go.tmpl

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"log"
+	"sync"
+
+	"gitcode.com/JianFeeeee/HomeAgent/internal/sdk"
+)
+
+type Plugin struct {
+	name string
+	sdk  *sdk.PluginSDK
+	mu   sync.RWMutex
+}
+
+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() {}