docs: migrate documentation to Fumadocs

apps/docs/source.config.ts

@@ -0,0 +1,32 @@
+import { remarkDirectiveAdmonition, remarkMdxMermaid } from "fumadocs-core/mdx-plugins";
+import { defineConfig } from "fumadocs-mdx/config";
+import remarkDirective from "remark-directive";
+
+export default defineConfig({
+  mdxOptions: {
+    remarkPlugins: [
+      remarkDirective,
+      [
+        remarkDirectiveAdmonition,
+        {
+          types: {
+            note: "info",
+            tip: "idea",
+            info: "info",
+            warn: "warning",
+            warning: "warning",
+            caution: "warning",
+            important: "warning",
+            danger: "error",
+            error: "error",
+            success: "success",
+          },
+        },
+      ],
+      remarkMdxMermaid,
+    ],
+    remarkImageOptions: {
+      onError: "hide",
+    },
+  },
+});