feat(fork)!: remove all frontend Enterprise-Edition code (community build)

Strip the proprietary client EE so the fork ships a clean community/AGPL
edition, mirroring Forkmost. Delete apps/client/src/ee (201 files) and
packages/ee, and patch every consumer that imported from @/ee/*.

- gate-out EE features (useHasFeature -> false): API keys, SSO, MFA, SCIM,
  audit logs, AI / AI-chat, templates, page permissions, page verification,
  comment resolution, trash retention, viewer comments
- drop cloud/billing/trial/entitlement/posthog flows; sign-in is now
  email+password only (no SSO/LDAP/cloud)
- remove EE routes from App.tsx and EE entries from sidebars/settings nav
- restore the community page-share button (ShareModal) that the EE
  PageShareModal used to provide
- remove the dead "Attachments" search filter, dead MFA navigation and
  orphaned route constants

Client type-checks clean; full `pnpm build` is green for all three projects.

apps/client/src/features/editor/full-editor.tsx

@@ -17,7 +17,6 @@ import { IconInfoCircle } from "@tabler/icons-react";
 import { useAtom } from "jotai";
 import { userAtom } from "@/features/user/atoms/current-user-atom.ts";
 import { CustomAvatar } from "@/components/ui/custom-avatar.tsx";
-import { PageVerificationBadge } from "@/ee/page-verification";
 import { useTranslation } from "react-i18next";
 import { IContributor } from "@/features/page/types/page.types.ts";
 import { FixedToolbar } from "@/features/editor/components/fixed-toolbar/fixed-toolbar";
@@ -105,7 +104,6 @@ export function FullEditor({
       <PageByline
         creator={creator}
         contributors={contributors}
-        readOnly={!editable}
       />
       <MemoizedPageEditor
         pageId={pageId}
@@ -120,10 +118,9 @@ export function FullEditor({
 type PageBylineProps = {
   creator?: PageUser;
   contributors?: IContributor[];
-  readOnly?: boolean;
 };
 
-function PageByline({ creator, contributors, readOnly }: PageBylineProps) {
+function PageByline({ creator, contributors }: PageBylineProps) {
   const { t } = useTranslation();
   const detailsTriggerProps = useAsideTriggerProps("details");
 
@@ -210,8 +207,6 @@ function PageByline({ creator, contributors, readOnly }: PageBylineProps) {
           <IconInfoCircle size={20} stroke={1.5} />
         </ActionIcon>
       </Tooltip>
-
-      <PageVerificationBadge readOnly={readOnly} />
     </Group>
   );
 }