Refactor Settings UI and Add Info Component

[NamanRai64]

What does this PR do?

• This PR consolidates and reorganizes the settings structure by merging theme and general settings into a unified Settings component, while adding a new Info settings page

##Key Changes:
New Components:

Info.tsx (+110 lines) - New settings information component
Settings.tsx (+181 lines) - Unified settings component combining previous separate settings modules
Removed Components:

AccountSettings.tsx (-129 lines) - Consolidated into new structure
GeneralSettings.tsx (-120 lines) - Merged into unified settings
ThemeSettings.tsx (-304 lines) - Merged into unified settings
Minor Updates:

FloatingHub.tsx: Adjusted by 7 additions, 20 deletions
Editor.tsx & EditorTabs.tsx: Small refactoring (8 changes each)
cinderTheme.ts: Theme adjustments (11 additions, 13 deletions)
markdown.css: Styling updates (18 additions, 25 deletions)
Net Result:
+341 additions, -625 deletions - Overall reduction in code while improving component organization and maintainability.