feat: Integrate Docusaurus for documentation and enhance project structure

- Added Docusaurus configuration and initial setup for documentation.
- Created multiple documentation pages covering installation, configuration, and core concepts.
- Implemented a GitHub Actions workflow for automatic deployment of documentation to GitHub Pages.
- Updated .gitignore to exclude Docusaurus build artifacts and dependencies.
- Enhanced README with a link to the online documentation.

docs/src/theme/SearchBar.tsx

@@ -0,0 +1,14 @@
+import React, {type ReactNode} from 'react';
+import SearchBar from '@theme-original/SearchBar';
+import type SearchBarType from '@theme/SearchBar';
+import type {WrapperProps} from '@docusaurus/types';
+
+type Props = WrapperProps<typeof SearchBarType>;
+
+export default function SearchBarWrapper(props: Props): ReactNode {
+  return (
+    <>
+      <SearchBar {...props} />
+    </>
+  );
+}