chore: add GitHub workflows, issue templates, and changelog

- Tests, Pint, Release, Changelog, Auto-merge, Deploy Docs workflows
- Bug report template, security policy, contributing guide
- Dependabot config for GitHub Actions
- Remove .idea from tracking
- Keep only premium packages in ecosystem section

.github/workflows/deploy-docs.yml

@@ -0,0 +1,137 @@
+name: Deploy Docs
+
+on:
+  push:
+    branches: ["1.x"]
+    paths:
+      - 'docs/**'
+      - '.github/workflows/deploy-docs.yml'
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version branch to deploy (e.g., 1.x)'
+        required: true
+        type: choice
+        options:
+          - '1.x'
+
+# Prevent concurrent deploys to avoid push conflicts
+concurrency:
+  group: deploy-docs
+  cancel-in-progress: false
+
+permissions:
+  contents: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Determine version
+        id: version
+        run: |
+          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            echo "branch=${{ inputs.version }}" >> $GITHUB_OUTPUT
+          else
+            echo "branch=${GITHUB_REF#refs/heads/}" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Set version config
+        id: config
+        run: |
+          BRANCH="${{ steps.version.outputs.branch }}"
+          case $BRANCH in
+            1.x)
+              echo "dest_folder=." >> $GITHUB_OUTPUT
+              echo "base_url=/comments/" >> $GITHUB_OUTPUT
+              echo "is_latest=true" >> $GITHUB_OUTPUT
+              ;;
+            *)
+              echo "Unknown branch: $BRANCH"
+              exit 1
+              ;;
+          esac
+
+      - name: Checkout source branch
+        uses: actions/checkout@v6
+        with:
+          ref: ${{ steps.version.outputs.branch }}
+
+      - name: Checkout gh-pages
+        uses: actions/checkout@v6
+        with:
+          ref: gh-pages
+          path: gh-pages
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: 'docs/package-lock.json'
+
+      - name: Install dependencies
+        working-directory: ./docs
+        run: npm ci
+
+      - name: Build documentation
+        working-directory: ./docs
+        run: npm run generate
+        env:
+          NUXT_APP_BASE_URL: ${{ steps.config.outputs.base_url }}
+          NUXT_SITE_URL: https://relaticle.github.io
+          DOCS_VERSION: ${{ steps.version.outputs.branch }}
+          NUXT_PUBLIC_FATHOM_SITE_ID: ${{ secrets.FATHOM_SITE_ID }}
+
+      - name: Deploy to gh-pages
+        run: |
+          DEST="${{ steps.config.outputs.dest_folder }}"
+          IS_LATEST="${{ steps.config.outputs.is_latest }}"
+
+          if [ "$IS_LATEST" == "true" ]; then
+            echo "Deploying latest version to root..."
+            cd gh-pages
+            # List of items to preserve
+            PRESERVE="versions.json .nojekyll README.md .git"
+            # Remove everything except preserved items
+            for item in *; do
+              if [ -e "$item" ]; then
+                SKIP=false
+                for keep in $PRESERVE; do
+                  if [ "$item" == "$keep" ]; then
+                    SKIP=true
+                    break
+                  fi
+                done
+                if [ "$SKIP" == "false" ]; then
+                  rm -rf "$item"
+                fi
+              fi
+            done
+            # Also remove hidden files except .git, .nojekyll
+            for item in .[!.]*; do
+              if [ -e "$item" ] && [ "$item" != ".git" ] && [ "$item" != ".nojekyll" ]; then
+                rm -rf "$item"
+              fi
+            done
+            cd ..
+            # Copy new build to root
+            cp -r docs/.output/public/* gh-pages/
+          else
+            echo "Deploying to $DEST subfolder..."
+            rm -rf "gh-pages/$DEST"
+            cp -r docs/.output/public "gh-pages/$DEST"
+          fi
+
+      - name: Commit and push
+        working-directory: ./gh-pages
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add -A
+          if git diff --staged --quiet; then
+            echo "No changes to deploy"
+          else
+            git commit -m "Deploy ${{ steps.version.outputs.branch }} docs"
+            git push
+          fi