chore: add helix-api and workspace config to monorepo

helix-api/docs/source.config.ts

@@ -0,0 +1,12 @@
+import { defineConfig, defineDocs } from 'fumadocs-mdx/config';
+
+export const docs = defineDocs({
+  dir: 'content/docs',
+  docs: {
+    postprocess: {
+      includeProcessedMarkdown: true,
+    },
+  },
+});
+
+export default defineConfig();