chore: Prepare merge of postgrest-docs into postgrest main repo

This avoids some merge conflicts to allow git blame to detect renames properly.

.github/workflows/docs.yaml

@@ -0,0 +1,51 @@
+name: Docs
+
+on:
+  push:
+    branches:
+    - main
+    - rel-*
+  pull_request:
+    branches:
+    - main
+    - rel-*
+
+jobs:
+  build:
+    name: Build docs
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+    - run: nix-env -f docs/default.nix -iA build
+    - run: postgrest-docs-build
+    - run: git diff --exit-code HEAD locales || echo "Please commit changes to the locales/ folder after running postgrest-docs-build."
+
+  spellcheck:
+    name: Run spellcheck
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+    - run: nix-env -f docs/default.nix -iA spellcheck
+    - run: postgrest-docs-spellcheck
+
+  dictcheck:
+    name: Run dictcheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v25
+      - run: nix-env -f docs/default.nix -iA dictcheck
+      - run: postgrest-docs-dictcheck
+
+  linkcheck:
+    name: Run linkcheck
+    if: github.base_ref == 'main'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+    - run: nix-env -f docs/default.nix -iA linkcheck
+    - run: postgrest-docs-linkcheck
+