feat: overhaul webui (#135)

feat: Added Inter Variable as the default font

feat: Added a pattern to the page background.

fix(react-multi-select-component): Made the multiselect components theme-agnostic, so it works properly with the light theme now.

fix(react-select): Made the components fix the default 30px height of the rest of the input components.

fix(useToggle): Fixed a bug where the toggle didn't work due to useCallback memoizing a callback with the old value.
refactor(Base):
- Added small theme-primary gradient to the beginning of the header.
- Made the splitter border theme-agnostic.
- Increased logo size a bit.
- Moved the links a bit closer to the logo.
- Updated the default link style to look more stylish.
- Added a link to the autobrr Docs section (currently defaults to the Indexers sections, but this should lead to an "Overview" page for configuring autobrr)
- Adapted the user dropdown to match the other header links' stylesheets and removed the annoying ring focus.
- Adapted the header for theme-agnostic mobile usage.
- Removed the negative padding/margin hacks.

refactor(StatsItem): Increased shadow size/strength and made the description text a bit lighter on the dark theme.

refactor(Dashboard): Increased the heading text sizes.

refactor(Logs, Releases, Settings, Login, filters/details, filters/list): Adapted to match the previous changes and improved theme compatibility with regards to text.

refactor(RegexPlayground): Fixed match highlight for JS regex.

web/src/index.tsx

@@ -1,5 +1,7 @@
 import { StrictMode } from "react";
 import ReactDOM from "react-dom";
+
+import "@fontsource/inter/variable.css";
 import "./index.css";
 
 import { App } from "./App";