feat(invitation-signup): optimize user registration process and enhance localization

- Introduced a new SQL migration to optimize the invitation signup process, allowing invited users to skip organization and team creation.
- Updated the `register_user` and `register_google_user` functions to handle invitation signups effectively.
- Enhanced the `deserialize_user` function to include an `invitation_accepted` flag.
- Added new localization keys for creating organizations and related messages in multiple languages, improving user experience across the application.
- Updated the SwitchTeamButton component to support organization creation and improved styling for better usability.

worklenz-frontend/public/locales/en/navbar.json

@@ -13,6 +13,12 @@
   "invite": "Invite",
   "inviteTooltip": "Invite team members to join",
   "switchTeamTooltip": "Switch team",
+  "createNewOrganization": "New Organization",
+  "createNewOrganizationSubtitle": "Create new",
+  "creatingOrganization": "Creating...",
+  "organizationCreatedSuccess": "Organization created successfully!",
+  "organizationCreatedError": "Failed to create organization",
+  "teamSwitchError": "Failed to switch team",
   "help": "Help",
   "notificationTooltip": "View notifications",
   "profileTooltip": "View profile",