Standard index as code introduction + type refactor (#16426)

# Introduction
Related https://github.com/twentyhq/core-team-issues/issues/1995

In this PR we're introducing the standard index tools for their
declaration
Also adding a common typing in order to have a simily consistency across
standard builders

Will implement remaining standard index builder in an other PR

packages/twenty-server/src/database/commands/compute-twenty-standard-workspace-migration.command.ts

@@ -30,10 +30,12 @@ export class ComputeTwentyStandardWorkspaceMigrationCommand extends CommandRunne
 
     // TODO: Implement migration logic here
     const workspaceId = '20202020-ef6f-4118-953c-2b027324b54a';
+    const twentyStandardApplicationId = '20202020-5adb-4091-81b7-d5be86a8bdd2';
     const twentyStandardAllFlatEntityMaps =
       computeTwentyStandardApplicationAllFlatEntityMaps({
-        createdAt: new Date(),
+        now: new Date(),
         workspaceId,
+        twentyStandardApplicationId,
       });
 
     writeFileSync(
@@ -48,6 +50,7 @@ export class ComputeTwentyStandardWorkspaceMigrationCommand extends CommandRunne
             isSystemBuild: true,
           },
           fromToAllFlatEntityMaps: {
+            // Should be dynamic
             flatObjectMetadataMaps: {
               from: createEmptyFlatEntityMaps(),
               to: twentyStandardAllFlatEntityMaps.flatObjectMetadataMaps,
@@ -56,6 +59,10 @@ export class ComputeTwentyStandardWorkspaceMigrationCommand extends CommandRunne
               from: createEmptyFlatEntityMaps(),
               to: twentyStandardAllFlatEntityMaps.flatFieldMetadataMaps,
             },
+            flatIndexMaps: {
+              from: createEmptyFlatEntityMaps(),
+              to: twentyStandardAllFlatEntityMaps.flatIndexMaps,
+            },
           },
           workspaceId,
         })