docs: enhance documentation with new modes and plugins

- Updated documentation to include new modes for configuring bknd (UI-only, Code-only, Hybrid).
- Introduced `syncSecrets` plugin example in the extending plugins documentation.
- Added `react-icons` dependency to package.json and package-lock.json.
- Enhanced various documentation pages with icons and improved content structure.

docs/lib/source.ts

@@ -1,23 +1,29 @@
 import { loader } from "fumadocs-core/source";
 import { docs } from "@/.source";
 import { createOpenAPI, attachFile } from "fumadocs-openapi/server";
-import { icons } from "lucide-react";
+import icons from "./icons";
 import { createElement } from "react";
+import { TbBrandReact, TbBrandTypescript } from "react-icons/tb";
+
+const add_icons = {
+   TypeScript: TbBrandTypescript,
+   React: TbBrandReact,
+};
 
 export const source = loader({
-  baseUrl: "/",
-  source: docs.toFumadocsSource(),
-  pageTree: {
-    // adds a badge to each page item in page tree
-    attachFile,
-  },
-  icon(icon) {
-    if (!icon) {
-      // You may set a default icon
-      return;
-    }
-    if (icon in icons) return createElement(icons[icon as keyof typeof icons]);
-  },
+   baseUrl: "/",
+   source: docs.toFumadocsSource(),
+   pageTree: {
+      // adds a badge to each page item in page tree
+      attachFile,
+   },
+   icon(icon) {
+      if (!icon) {
+         // You may set a default icon
+         return;
+      }
+      if (icon in icons) return createElement(icons[icon as keyof typeof icons]);
+   },
 });
 
 export const openapi = createOpenAPI();