feat: move support links to workspace switcher (#16653)

## Summary
Move the Support and Documentation links from the bottom left navigation
drawer to the workspace switcher dropdown menu.

## Changes
- **Workspace Switcher**: Added Support (conditional) and Documentation
links before Log out
- **Settings Navigation**: Added Support and Documentation links in the
Other section
- **Support visibility**: Support link only appears when FrontChat is
configured (not waiting for script to load)
- **FrontChat loading**: Created `SupportChatEffect` component to ensure
FrontChat script loads at app startup for popup notifications
- **Bug fix**: Fixed settings navigation items without a path appearing
highlighted
- **Cleanup**: Removed unused `SupportDropdown`, `SupportButton`, and
`SupportButtonSkeletonLoader` components
- **Hidden**: Temporarily commented out Integrations page

## Screenshots
The Support and Documentation links now appear in:
1. Workspace switcher dropdown (top left)
2. Settings navigation (Other section)

packages/twenty-front/src/modules/support/utils/getDocumentationUrl.ts

@@ -0,0 +1,20 @@
+const DOCUMENTATION_BASE_URL = 'https://docs.twenty.com';
+const DOCUMENTATION_PATH = '/user-guide/introduction';
+
+// Locales that have documentation translations available
+const SUPPORTED_DOC_LOCALES = ['fr', 'pt', 'de', 'es', 'it', 'ja', 'ko', 'zh'];
+
+export const getDocumentationUrl = (locale?: string | null): string => {
+  if (!locale) {
+    return `${DOCUMENTATION_BASE_URL}${DOCUMENTATION_PATH}`;
+  }
+
+  // Extract language code from locale (e.g., 'fr' from 'fr-FR')
+  const langCode = locale.split('-')[0].toLowerCase();
+
+  if (SUPPORTED_DOC_LOCALES.includes(langCode)) {
+    return `${DOCUMENTATION_BASE_URL}/l/${langCode}${DOCUMENTATION_PATH}`;
+  }
+
+  return `${DOCUMENTATION_BASE_URL}${DOCUMENTATION_PATH}`;
+};