Add useGroupBy hook + update calendar view to use groupBy (#15439)

## Context
Took inspiration from findMany + kanban => Implemented a hook for the
new groupBy API endpoints
Fixed an issue when DnD to an empty day

packages/twenty-front/src/modules/object-record/graphql/types/RecordGqlOperationGroupByResult.ts

@@ -0,0 +1,9 @@
+import { type RecordGqlConnection } from '@/object-record/graphql/types/RecordGqlConnection';
+
+export type RecordGqlGroupByConnection = RecordGqlConnection & {
+  groupByDimensionValues: string[];
+};
+
+export type RecordGqlOperationGroupByResult = {
+  [objectNamePlural: string]: RecordGqlGroupByConnection[];
+};

packages/twenty-front/src/modules/object-record/graphql/types/RecordGqlOperationGroupByVariables.ts

@@ -0,0 +1,10 @@
+import { type RecordGqlOperationOrderBy } from '@/object-record/graphql/types/RecordGqlOperationOrderBy';
+import { type RecordGqlOperationFilter } from 'twenty-shared/types';
+
+export type RecordGqlOperationGroupByVariables = {
+  groupBy: Record<string, any>[];
+  filter?: RecordGqlOperationFilter;
+  orderBy?: Record<string, any>[];
+  orderByForRecords?: RecordGqlOperationOrderBy;
+  viewId?: string;
+};