docs: add lychee github action for test purposes

.github/workflows/lychee.yml

@@ -0,0 +1,14 @@
+name: Lychee Link Checker
+
+on: [pull_request]
+
+jobs:
+  LinkCheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: lycheeverse/[email protected]
+        with:
+          fail: true
+          args: --base https://docs.apify.com sources/ --verbose --no-progress './**/*.md' './**/*.mdx'

.lycheeignore

@@ -0,0 +1,3 @@
+http:\/\/localhost:3000.*
+https:\/\/www\.youtube.*
+\.(jpg|jpeg|png|gif|bmp|webp|svg)$