Update README and localization files to remove "self-hosted" references

- Revised the README.md to simplify the description of Nexumi.
- Updated layout.tsx to reflect the change in the bot's description.
- Modified German and English localization files to remove "self-hosted" from the bot's description and terms of service.

apps/webui/src/messages/en.json

@@ -737,7 +737,7 @@
   },
   "landing": {
     "hero": {
-      "subtitle": "Self-hosted Discord bot with moderation, community, and integration modules plus a web dashboard.",
+      "subtitle": "Discord bot with moderation, community, and integration modules plus a web dashboard.",
       "invite": "Invite bot",
       "login": "Open dashboard",
       "dashboard": "Open dashboard",
@@ -789,13 +789,13 @@
       "title": "Privacy policy",
       "p1": "Nexumi processes Discord data as required to operate the bot and dashboard (e.g. guild IDs, user IDs, moderation cases, module settings).",
       "p2": "Dashboard login uses Discord OAuth2 (identify and guilds scopes). Session data is stored in Redis.",
-      "p3": "Data is stored in the self-hosted PostgreSQL database. Retention can be configured per module or via deletion requests.",
+      "p3": "Data is stored in our PostgreSQL database. Retention can be configured per module or via deletion requests.",
       "p4": "Data is not shared with third parties except where technically required (e.g. Discord API, optional Sentry).",
       "p5": "Data subjects may request access, correction, and deletion via the contact in the legal notice or bot commands where available."
     },
     "terms": {
       "title": "Terms of service",
-      "p1": "Nexumi is provided as a self-hosted Discord bot. Use is at your own risk.",
+      "p1": "Nexumi is provided as a Discord bot. Use is at your own risk.",
       "p2": "Abuse, spam, or violations of Discord Terms of Service may result in blacklisting.",
       "p3": "We do not guarantee uninterrupted service. Maintenance windows are announced when possible.",
       "p4": "German law applies unless mandatory consumer protection rules require otherwise."