[WEB-5860] style: improved profile settings interface

[aaryan610]

Description

This PR improves the profile settings interface-

1. Introduces a new modal for profile settings instead of the current separate route under workspace slug.
2. Introduces new redirections-
   • profile/* -> settings/profile/*
   • :workspaceSlug/settings/account/* -> settings/profile/*

Type of Change

• [x] Improvement (change that would cause existing functionality to not work as expected)

Media

https://github.com/user-attachments/assets/aa2188f1-8dac-41bc-8c3f-6a6413e95ee6

Summary by CodeRabbit

• Refactor

  • Consolidated profile and account settings into a unified, tab-driven settings area and updated navigation/redirects accordingly.
  • Simplified settings layouts and sidebar behavior; many legacy account pages were removed in favor of the new profile-centered structure.

• New Features

  • Added a profile settings modal, tabbed profile settings pages (general, preferences, notifications, security, activity, API tokens), and a theme/preferences UI with improved controls and timezone/language options.

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