Icon microsoft (#9907)

Implementing the Outlook icon for CreatedBy, only for emails.

Not in this PR original scope : The similar feature for calendar created
records. Since it was straightforward, I added it to the scope of this
PR.

Fix https://github.com/twentyhq/core-team-issues/issues/252

packages/twenty-server/src/engine/metadata-modules/field-metadata/utils/generate-default-value.ts

@@ -2,6 +2,8 @@ import { FieldMetadataType } from 'twenty-shared';
 
 import { FieldMetadataDefaultValue } from 'src/engine/metadata-modules/field-metadata/interfaces/field-metadata-default-value.interface';
 
+import { FieldActorSource } from 'src/engine/metadata-modules/field-metadata/composite-types/actor.composite-type';
+
 export function generateDefaultValue(
   type: FieldMetadataType,
 ): FieldMetadataDefaultValue {
@@ -52,6 +54,12 @@ export function generateDefaultValue(
         blocknote: "''",
         markdown: "''",
       };
+    case FieldMetadataType.ACTOR:
+      return {
+        source: `'${FieldActorSource.MANUAL}'`,
+        name: "'System'",
+        context: {},
+      };
     default:
       return null;
   }