Reset Fields widget implementation (#19283)

## Context
This PR implements the first steps for overridable entities resets.

<img width="1277" height="568" alt="Screenshot 2026-04-02 at 18 58 04"
src="https://github.com/user-attachments/assets/4c7f93b1-c453-4905-a919-cd6af11e0e16"
/>

packages/twenty-client-sdk/src/metadata/generated/schema.graphql

@@ -3459,6 +3459,7 @@ type Mutation {
   updatePageLayout(id: String!, input: UpdatePageLayoutInput!): PageLayout!
   destroyPageLayout(id: String!): Boolean!
   updatePageLayoutWithTabsAndWidgets(id: String!, input: UpdatePageLayoutWithTabsInput!): PageLayout!
+  resetPageLayoutWidgetToDefault(id: String!): PageLayoutWidget!
   createPageLayoutWidget(input: CreatePageLayoutWidgetInput!): PageLayoutWidget!
   updatePageLayoutWidget(id: String!, input: UpdatePageLayoutWidgetInput!): PageLayoutWidget!
   destroyPageLayoutWidget(id: String!): Boolean!

packages/twenty-client-sdk/src/metadata/generated/schema.ts

@@ -2906,6 +2906,7 @@ export interface Mutation {
     updatePageLayout: PageLayout
     destroyPageLayout: Scalars['Boolean']
     updatePageLayoutWithTabsAndWidgets: PageLayout
+    resetPageLayoutWidgetToDefault: PageLayoutWidget
     createPageLayoutWidget: PageLayoutWidget
     updatePageLayoutWidget: PageLayoutWidget
     destroyPageLayoutWidget: Scalars['Boolean']
@@ -6155,6 +6156,7 @@ export interface MutationGenqlSelection{
     updatePageLayout?: (PageLayoutGenqlSelection & { __args: {id: Scalars['String'], input: UpdatePageLayoutInput} })
     destroyPageLayout?: { __args: {id: Scalars['String']} }
     updatePageLayoutWithTabsAndWidgets?: (PageLayoutGenqlSelection & { __args: {id: Scalars['String'], input: UpdatePageLayoutWithTabsInput} })
+    resetPageLayoutWidgetToDefault?: (PageLayoutWidgetGenqlSelection & { __args: {id: Scalars['String']} })
     createPageLayoutWidget?: (PageLayoutWidgetGenqlSelection & { __args: {input: CreatePageLayoutWidgetInput} })
     updatePageLayoutWidget?: (PageLayoutWidgetGenqlSelection & { __args: {id: Scalars['String'], input: UpdatePageLayoutWidgetInput} })
     destroyPageLayoutWidget?: { __args: {id: Scalars['String']} }

packages/twenty-client-sdk/src/metadata/generated/types.ts

@@ -7782,6 +7782,15 @@ export default {
                     ]
                 }
             ],
+            "resetPageLayoutWidgetToDefault": [
+                75,
+                {
+                    "id": [
+                        1,
+                        "String!"
+                    ]
+                }
+            ],
             "createPageLayoutWidget": [
                 75,
                 {