docs checker job

.github/workflows/docs_checker.yml

@@ -0,0 +1,39 @@
+name: Forge docs checker
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - "*"
+
+env:
+  GO_VERSION: "1.20.8"
+
+jobs:
+  docs_checker:
+    name: docs_checker
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Checkout Teleporter repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+        with:
+          version: nightly
+
+      - name: Generate forge docs
+        run: |
+          cd contracts
+          forge docs --build
+
+      - name: Print diff
+        run: git --no-pager diff -- contracts/docs/
+
+      - name: Fail if diff exists
+        run: git --no-pager diff --quiet -- contracts/docs/