feat: add search box to filter settings items (#833)

[zackycodes]

Description

Addresses #833 by introducing a dynamic real-time search/filter input at the top of the settings panel. This allows users to quickly find specific configuration options (like "wallpaper", "clock", or "font") without manually scrolling through the extensive options list.

Changes Made

• src/settings.html: Inserted a minimalist search input field at the top of the settings panel layout.
• src/scripts/settings.ts: Implemented client-side filtering logic within settingsInitEvent() that:
  • Dynamically shows/hides individual .param elements based on case-insensitive matches against user input.
  • Automatically hides empty .settings-title sections when none of their nested parameters match the search query.

Closes

Closes #833

[morceaudebois]

Thanks for the PR. I assume this is vibe coded though?

And I can't seem to make it work, nothing happens when I type things in the search input. It's also not that well integrated visually (UI is too minimal, no light mode support) or to the project's current architecture (inline CSS where the rest of the project has dedicated .css files).

[victrme]

TODO for @zackycodes:

• Handle settings in disabled widgets
• Handle sub-options (analog clock > clock style)
• Handle dark/light theme
• Add translations to placeholder
• Move styling to settings .css
• Only show on "All settings"

We'll only consider merging this implementation when all these requirements are met!

[victrme]

And of course type-checking deno check passing without errors.