ci: added github pages deployment workflow

Author: manchenkoff

.github/workflows/docs.yml

@@ -0,0 +1,86 @@
+name: Publish Docs
+
+env:
+  node_version: 20
+
+on:
+  push:
+    branches: ["main"]
+
+  workflow_dispatch: # manual trigger
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: ./docs
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Detect package manager
+        id: detect-package-manager
+        run: |
+          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
+            echo "manager=yarn" >> $GITHUB_OUTPUT
+            echo "command=install" >> $GITHUB_OUTPUT
+            exit 0
+          elif [ -f "${{ github.workspace }}/package.json" ]; then
+            echo "manager=npm" >> $GITHUB_OUTPUT
+            echo "command=ci" >> $GITHUB_OUTPUT
+            exit 0
+          else
+            echo "Unable to determine package manager"
+            exit 1
+          fi
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.node_version }}
+          cache: ${{ steps.detect-package-manager.outputs.manager }}
+
+      - name: Restore cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            dist
+            .nuxt
+          key: ${{ runner.os }}-nuxt-build-${{ hashFiles('dist') }}
+          restore-keys: |
+            ${{ runner.os }}-nuxt-build-
+
+      - name: Install dependencies
+        run: ${{ steps.detect-package-manager.outputs.manager }} ${{ steps.detect-package-manager.outputs.command }}
+
+      - name: Build pages preset
+        run: ${{ steps.detect-package-manager.outputs.manager }} run build:pages
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: ./.output/public
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4