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/scripts/build-sdk.mjs

@@ -2,16 +2,27 @@ import { mkdir, readFile, writeFile } from "node:fs/promises";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
 import { minify } from "terser";
+import ts from "typescript";
 
 const currentDir = path.dirname(fileURLToPath(import.meta.url));
 const rootDir = path.resolve(currentDir, "..");
-const source = path.join(rootDir, "lib", "sdk", "cs-ai-agent-sdk.js");
+const source = path.join(rootDir, "lib", "sdk", "cs-ai-agent-sdk.ts");
 const targetDir = path.join(rootDir, "public", "sdk");
 const target = path.join(targetDir, "cs-ai-agent-sdk.min.js");
 
 await mkdir(targetDir, { recursive: true });
 const sourceCode = await readFile(source, "utf8");
-const result = await minify(sourceCode, {
+const compiled = ts.transpileModule(sourceCode, {
+  compilerOptions: {
+    target: ts.ScriptTarget.ES2017,
+    module: ts.ModuleKind.ESNext,
+    importsNotUsedAsValues: ts.ImportsNotUsedAsValues.Remove,
+    removeComments: true,
+  },
+  fileName: source,
+});
+const compiledCode = compiled.outputText.replace(/\nexport\s*\{\};?\s*$/, "");
+const result = await minify(compiledCode, {
   compress: {
     passes: 2,
   },