Add comprehensive installation and setup documentation

- Add GETTING_STARTED.md with quick start guide and development modes
- Add INSTALL.sh automated installation script
- Add INSTALLATION_CHECKLIST.md, INSTALLATION_SUCCESS.md, and INSTALLATION_SUMMARY.md
- Add QUICK_REFERENCE.md for common commands
- Add SETUP_GUIDE.md with detailed setup instructions
- Update README.md with improved project overview
- Add did-wallet app dependencies and node_modules

apps/web5-dwn/node_modules/err-code/dist/index.d.ts

@@ -0,0 +1,16 @@
+export = createError;
+/**
+ *
+ * @param {any} err - An Error
+ * @param {string|Extensions} code - A string code or props to set on the error
+ * @param {Extensions} [props] - Props to set on the error
+ * @returns {Error & Extensions}
+ */
+declare function createError(err: any, code: string | Extensions, props?: Extensions | undefined): Error & Extensions;
+declare namespace createError {
+    export { Extensions, Err };
+}
+type Extensions = {
+    [key: string]: any;
+};
+type Err = Error;