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/App.tsx

@@ -84,7 +84,6 @@ import { SettingsBilling } from '~/pages/settings/SettingsBilling';
 import { SettingsProfile } from '~/pages/settings/SettingsProfile';
 import { SettingsWorkspace } from '~/pages/settings/SettingsWorkspace';
 import { SettingsWorkspaceMembers } from '~/pages/settings/SettingsWorkspaceMembers';
-import { Tasks } from '~/pages/tasks/Tasks';
 import { getPageTitleFromPath } from '~/utils/title-utils';
 
 const ProvidersThatNeedRouterContext = () => {
@@ -158,7 +157,6 @@ const createRouter = (
             element={<PaymentSuccess />}
           />
           <Route path={indexAppPath.getIndexAppPath()} element={<></>} />
-          <Route path={AppPath.TasksPage} element={<Tasks />} />
           <Route path={AppPath.Impersonate} element={<ImpersonateEffect />} />
           <Route path={AppPath.RecordIndexPage} element={<RecordIndexPage />} />
           <Route path={AppPath.RecordShowPage} element={<RecordShowPage />} />