feat:企业微信客户端API JS-SDK wx.config 和 wx.agentConfig 方法权限签名 (#817)

* feat: enhance WorkAccessToken to include AgentID for improved token management

- Added AgentID field to WorkAccessToken struct.
- Updated NewWorkAccessToken function to accept AgentID as a parameter.
- Modified access token cache key to incorporate AgentID, ensuring unique cache entries per agent.

This change improves the handling of access tokens in a multi-agent environment.

* refactor: enhance WorkAccessToken to improve cache key handling

- Updated the AgentID field in WorkAccessToken struct to clarify its optional nature for distinguishing applications.
- Modified the access token cache key construction to support both new and legacy formats based on the presence of AgentID.
- Added comments for better understanding of the cache key logic and its compatibility with historical versions.

This change improves the flexibility and clarity of access token management in multi-agent scenarios.

* feat(work): add JsSdk method for JavaScript SDK integration

- Introduced a new JsSdk method in the Work struct to facilitate the creation of a Js instance.
- This addition enhances the functionality of the Work module by enabling JavaScript SDK support.

This change improves the integration capabilities for developers working with the WeChat Work API.

* fix gofmt

work/jsapi/jsapi.go

@@ -0,0 +1,73 @@
+package jsapi
+
+import (
+	"strconv"
+
+	"github.com/silenceper/wechat/v2/credential"
+	"github.com/silenceper/wechat/v2/util"
+	"github.com/silenceper/wechat/v2/work/context"
+)
+
+// Js struct
+type Js struct {
+	*context.Context
+	jsTicket *credential.WorkJsTicket
+}
+
+// NewJs init
+func NewJs(context *context.Context) *Js {
+	js := new(Js)
+	js.Context = context
+	js.jsTicket = credential.NewWorkJsTicket(
+		context.Config.CorpID,
+		context.Config.AgentID,
+		credential.CacheKeyWorkPrefix,
+		context.Cache,
+	)
+	return js
+}
+
+// Config 返回给用户使用的配置
+type Config struct {
+	Timestamp int64  `json:"timestamp"`
+	NonceStr  string `json:"nonce_str"`
+	Signature string `json:"signature"`
+}
+
+// GetConfig 获取企业微信JS配置 https://developer.work.weixin.qq.com/document/path/90514
+func (js *Js) GetConfig(uri string) (config *Config, err error) {
+	config = new(Config)
+	var accessToken string
+	accessToken, err = js.GetAccessToken()
+	if err != nil {
+		return
+	}
+	var ticketStr string
+	ticketStr, err = js.jsTicket.GetTicket(accessToken, credential.TicketTypeCorpJs)
+	if err != nil {
+		return
+	}
+	config.NonceStr = util.RandomStr(16)
+	config.Timestamp = util.GetCurrTS()
+	config.Signature = util.Signature(ticketStr, config.NonceStr, strconv.FormatInt(config.Timestamp, 10), uri)
+	return
+}
+
+// GetAgentConfig 获取企业微信应用JS配置 https://developer.work.weixin.qq.com/document/path/94313
+func (js *Js) GetAgentConfig(uri string) (config *Config, err error) {
+	config = new(Config)
+	var accessToken string
+	accessToken, err = js.GetAccessToken()
+	if err != nil {
+		return
+	}
+	var ticketStr string
+	ticketStr, err = js.jsTicket.GetTicket(accessToken, credential.TicketTypeAgentJs)
+	if err != nil {
+		return
+	}
+	config.NonceStr = util.RandomStr(16)
+	config.Timestamp = util.GetCurrTS()
+	config.Signature = util.Signature(ticketStr, config.NonceStr, strconv.FormatInt(config.Timestamp, 10), uri)
+	return
+}