feat: restructure plugin system, add Lua plugin support, update docs

internal/plugins/agentcli/plugin_stub.go

@@ -0,0 +1,21 @@
+//go:build !linux
+
+package agentcli
+
+import (
+	"gitcode.com/JianFeeeee/HomeAgent/internal/plugin"
+	sdk "gitcode.com/JianFeeeee/HomeAgent/internal/sdk"
+)
+
+func init() {
+	plugin.RegisterFactory("agentcli", func(name string, config map[string]interface{}) (sdk.Plugin, error) {
+		return &stubPlugin{}, nil
+	})
+	plugin.RegisterPluginMeta("agentcli", "终端交互", "Agent CLI")
+}
+
+type stubPlugin struct{}
+
+func (p *stubPlugin) Name() string                 { return "agentcli" }
+func (p *stubPlugin) Start(sdk *sdk.PluginSDK) error { return nil }
+func (p *stubPlugin) Stop() error                  { return nil }