Enhance bot and WebUI functionality with new features and environment updates

- Added support for new environment variables in `.env.example` for public site and legal operator information.
- Integrated core commands into the bot's command structure for improved functionality.
- Implemented a new `publishBotStatus` function to update bot status in Redis, enhancing monitoring capabilities.
- Updated the landing page to include features, invite links, and support server access, improving user experience.
- Enhanced localization with new keys for core commands and landing page elements in both English and German.
- Improved error handling and logging for bot presence updates and status publishing.

apps/bot/src/modules/core/command-definitions.ts

@@ -0,0 +1,24 @@
+import { SlashCommandBuilder } from 'discord.js';
+import { applyCommandDescription, applyOptionDescription } from '@nexumi/shared';
+
+export const helpCommandData = applyCommandDescription(
+  new SlashCommandBuilder().setName('help'),
+  'core.help.description'
+).addStringOption((option) =>
+  applyOptionDescription(option.setName('module'), 'core.help.options.module')
+);
+
+export const infoCommandData = applyCommandDescription(
+  new SlashCommandBuilder().setName('info'),
+  'core.info.description'
+);
+
+export const inviteCommandData = applyCommandDescription(
+  new SlashCommandBuilder().setName('invite'),
+  'core.invite.description'
+);
+
+export const supportCommandData = applyCommandDescription(
+  new SlashCommandBuilder().setName('support'),
+  'core.support.description'
+);