feat: adds pre/post-request script editing

Updates request model state management to include pre-request and post-request script fields.
Connects the script editor UI to the state notifier, allowing script changes to be persisted.

lib/providers/collection_providers.dart

@@ -223,6 +223,8 @@ class CollectionStateNotifier
     int? responseStatus,
     String? message,
     HttpResponseModel? httpResponseModel,
+    String? preRequestScript,
+    String? postRequestScript,
   }) {
     final rId = id ?? ref.read(selectedIdStateProvider);
     if (rId == null) {
@@ -254,6 +256,8 @@ class CollectionStateNotifier
       responseStatus: responseStatus ?? currentModel.responseStatus,
       message: message ?? currentModel.message,
       httpResponseModel: httpResponseModel ?? currentModel.httpResponseModel,
+      preRequestScript: preRequestScript ?? currentModel.preRequestScript,
+      postRequestScript: postRequestScript ?? currentModel.postRequestScript,
     );
 
     var map = {...state!};

lib/screens/home_page/editor_pane/details_card/request_pane/scripts_code_pane.dart

@@ -1,28 +1,45 @@
 import 'package:apidash/widgets/scripts_editor_pane.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_code_editor/flutter_code_editor.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:highlight/languages/javascript.dart';
+import 'package:apidash/providers/providers.dart';
 
-class ScriptsCodePane extends StatefulWidget {
+class ScriptsCodePane extends ConsumerStatefulWidget {
   const ScriptsCodePane({super.key});
 
   @override
-  State<ScriptsCodePane> createState() => _ScriptsCodePaneState();
+  ConsumerState<ScriptsCodePane> createState() => _ScriptsCodePaneState();
 }
 
-class _ScriptsCodePaneState extends State<ScriptsCodePane> {
+class _ScriptsCodePaneState extends ConsumerState<ScriptsCodePane> {
+  @override
+  Widget build(BuildContext context) {
     int _selectedTabIndex = 0;
+    final requestModel = ref.read(selectedRequestModelProvider);
+
     final preReqCodeController = CodeController(
-    text: '// Use javascript to modify this request dynamically',
+      text: requestModel?.preRequestScript,
-    language: javascript,
-  );
-  final postResCodeController = CodeController(
-    text: '...',
       language: javascript,
     );
 
-  @override
+    final postResCodeController = CodeController(
-  Widget build(BuildContext context) {
+      text: requestModel?.postRequestScript,
+      language: javascript,
+    );
+
+    preReqCodeController.addListener(() {
+      ref.read(collectionStateNotifierProvider.notifier).update(
+            preRequestScript: preReqCodeController.text,
+          );
+    });
+
+    postResCodeController.addListener(() {
+      ref.read(collectionStateNotifierProvider.notifier).update(
+            postRequestScript: postResCodeController.text,
+          );
+    });
+
     final tabs = ["Pre-Req", "Post-Res"];
     final content = [
       ScriptsEditorPane(