Support Obsidian light and dark color schemes in theme

[rudironsoni]

Request

Please add theme support for Obsidian's light and dark color schemes.

Motivation

NativePowerPointDocEditor appears to target document editing workflows that can benefit from visual consistency with Obsidian. Supporting both Obsidian color schemes would make the UI feel more native for users who work across Obsidian and this editor, especially when switching between light and dark mode.

Expected behavior

• The theme should provide an Obsidian-compatible light color scheme.
• The theme should provide an Obsidian-compatible dark color scheme.
• The editor should respect the user's selected mode when applicable.
• Text, backgrounds, borders, highlights, and interactive states should remain readable and accessible in both modes.

Acceptance criteria

• Light mode uses colors aligned with Obsidian's light theme.
• Dark mode uses colors aligned with Obsidian's dark theme.
• The theme can switch between light and dark without requiring a restart, if the app currently supports runtime theme switching.
• Core UI elements remain legible in both themes, including menus, panels, buttons, inputs, selected text, and hover/focus states.

Thanks for considering this.