Activity as standard object (#6219)

In this PR I layout the first steps to migrate Activity to a traditional
Standard objects

Since this is a big transition, I'd rather split it into several
deployments / PRs

<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/012e2bbf-9d1b-4723-aaf6-269ef588b050">

---------

Co-authored-by: Charles Bochet <charles@twenty.com>
Co-authored-by: bosiraphael <71827178+bosiraphael@users.noreply.github.com>
Co-authored-by: Weiko <corentin@twenty.com>
Co-authored-by: Faisal-imtiyaz123 <142205282+Faisal-imtiyaz123@users.noreply.github.com>
Co-authored-by: Prateek Jain <prateekj1171998@gmail.com>

packages/twenty-front/src/modules/settings/data-model/constants/SettingsFieldTypeConfigs.ts

@@ -4,6 +4,7 @@ import {
   IconCheck,
   IconCoins,
   IconComponent,
+  IconFilePencil,
   IconJson,
   IconKey,
   IconLink,
@@ -131,6 +132,11 @@ export const SETTINGS_FIELD_TYPE_CONFIGS = {
     Icon: IconJson,
     defaultValue: { key: 'value' },
   },
+  [FieldMetadataType.RichText]: {
+    label: 'Rich Text',
+    Icon: IconFilePencil,
+    defaultValue: { key: 'value' },
+  },
 } as const satisfies Record<
   SettingsSupportedFieldType,
   SettingsFieldTypeConfig