Add global /about command and configuration

- Introduced `BotAboutConfig` model for managing the global `/about` message in the owner panel.
- Implemented the `/about` command with localization support and integrated it into the help catalog.
- Enhanced the dashboard with a new owner section for configuring the `/about` message type and content.
- Updated components to handle the new command and its interactions, including support for different message formats (TEXT, EMBED, COMPONENTS_V2).
- Added localization entries for the `/about` command in English and German, improving accessibility for users.
- Documented the implementation in the phase tracking documentation for future reference.

apps/bot/prisma/migrations/20260724120000_bot_about/migration.sql

@@ -0,0 +1,12 @@
+-- CreateTable
+CREATE TABLE "BotAboutConfig" (
+    "id" TEXT NOT NULL DEFAULT 'singleton',
+    "enabled" BOOLEAN NOT NULL DEFAULT true,
+    "messageType" TEXT NOT NULL DEFAULT 'EMBED',
+    "content" TEXT,
+    "embed" JSONB,
+    "components" JSONB,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "BotAboutConfig_pkey" PRIMARY KEY ("id")
+);