feat: add redirect from /docs/[operator] to /operators/[operator]

CONTRIBUTING.md

@@ -12,3 +12,26 @@
 > Note: be careful NOT to commit `babel-plugin-factories.json` with changed library name `@effector/patronum`
 
 When work is done, please remove `@effector/patronum` from integration packages via `pnpm remove @effector/patronum`, else CI can be broken.
+
+## Documentation
+
+All the documentation source code placed in `./documentation`. It is uses [astro](https://astro.build) and [starlight](https://starlight.astro.build) on top of it.
+
+Documentation for operators placed right in the operator directory:
+
+```
+./src/
+├── and/
+│   ├── and.fork.test.ts
+│   ├── and.test.ts
+│   ├── index.ts
+│   └── readme.md
+├── combine-events/
+│   ├── combine-events.fork.test.ts
+│   ├── combine-events.test.ts
+│   ├── index.ts
+│   └── readme.md
+...
+```
+
+Documentation uses [Content Layer API](https://docs.astro.build/en/reference/configuration-reference/#querying-and-rendering-with-the-content-layer-api). You may want to [read this discussion](https://github.com/withastro/starlight/discussions/2268).

documentation/src/pages/docs/[operator].astro

@@ -0,0 +1,20 @@
+---
+import { getCollection, getEntry, render } from "astro:content";
+import StarlightPage from "@astrojs/starlight/components/StarlightPage.astro";
+
+export async function getStaticPaths() {
+  const operators = await getCollection("operators");
+  return operators.map((operator) => ({
+    params: { operator: operator.data.slug },
+  }));
+}
+
+const operator = await getEntry("operators", Astro.params.operator);
+---
+
+<meta http-equiv="refresh" content={`0;url=/operators/${operator.data.slug}`} />
+<meta name="robots" content="noindex" />
+<StarlightPage frontmatter={{...operator.data, pagefind: false}}>
+  <!-- exclude this page from pagefind indexing -->
+  <p>Redirecting to <a href="/operators/{operator.data.slug}">/operators/{operator.data.slug}</a></p>
+</StarlightPage>