feat: add runtime configuration for Kefu Chat SDK

- Introduced `readKefuChatRuntimeConfig` and `setKefuChatRuntimeConfig` functions to manage runtime configuration for the Kefu Chat SDK.
- Updated `useKefuChatStore` to utilize the new runtime configuration functions instead of the previous widget config methods.
- Modified the SDK build process to compile TypeScript instead of JavaScript, enhancing type safety and maintainability.
- Updated the minified SDK file to reflect the changes in configuration handling and TypeScript compilation.

web/lib/im-realtime.ts

@@ -1,6 +1,6 @@
 import { createWebSocketBaseUrl } from "@/lib/api/websocket"
 import { getCustomerSessionToken, type ImMessage } from "@/lib/api/im"
-import { readKefuWidgetConfig } from "@/lib/kefu-widget-config"
+import { readKefuChatRuntimeConfig } from "@/lib/sdk/runtime-config"
 import type {
   RealtimeConversationPatch,
   RealtimeMessageCreatedPayload,
@@ -22,7 +22,7 @@ export type ImRealtimeEnvelope = {
 }
 
 export function createImRealtimeConnection() {
-  const config = readKefuWidgetConfig()
+  const config = readKefuChatRuntimeConfig()
   const apiBaseUrl = (config.apiBaseUrl || "").trim()
   const baseUrl = apiBaseUrl
     ? apiBaseUrl.replace(/^http/, "ws").replace(/\/$/, "")