Chore: move secretary to native GHA

.github/workflows/pr-bot.yml

@@ -0,0 +1,111 @@
+name: Paperless-ngx PR Bot
+
+on:
+  pull_request:
+    types: [opened]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  label-and-comment:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Get PR Diff
+        id: diff
+        run: |
+          curl -sSL -H "Accept: application/vnd.github.v3.diff" \
+            "${{ github.event.pull_request.url }}" > pr.diff
+
+      - name: Determine Labels and Comment
+        id: label-and-comment
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const diff = fs.readFileSync('pr.diff', 'utf8');
+            const user = context.payload.pull_request.user.login;
+            const isBot = user.includes('bot');
+            const labels = new Set();
+            let changeCount = 0;
+
+            // Simple diff parsing
+            const files = diff.match(/^diff --git a\/(.+?) b\//gm)?.map(line => line.split(' ')[2]) || [];
+
+            for (const file of files) {
+              if (file.startsWith('src/')) labels.add('backend');
+              if (file.startsWith('pyproject.toml')) labels.add('backend');
+              if (file.startsWith('src-ui/')) labels.add('frontend');
+              if (file.startsWith('docs/')) labels.add('documentation');
+              if (file.startsWith('.github/')) labels.add('ci-cd');
+            }
+
+            // Change size estimate (added lines > 2 chars, non-docs)
+            const addedLines = diff.match(/^\+[^+]/gm) || [];
+            for (const line of addedLines) {
+              const trimmed = line.slice(1).trim();
+              if (trimmed.length > 2 && !/\.(md|rst|txt|lock)$/.test(line)) {
+                changeCount++;
+              }
+            }
+
+            if (changeCount < 10) labels.add('small-change');
+            else labels.add('non-trivial');
+
+            if (user.includes('dependabot')) {
+              labels.clear();
+              labels.add('dependencies');
+            }
+
+            if (user.includes('paperlessngx-bot')) {
+              labels.add('skip-changelog');
+              labels.add('translation');
+            }
+
+            core.setOutput('labels', JSON.stringify([...labels]));
+            core.setOutput('should_comment', (!isBot).toString());
+            core.setOutput('user', user);
+
+      - name: Apply Labels
+        if: steps.label-and-comment.outputs.labels != '[]'
+        run: |
+          gh pr edit ${{ github.event.pull_request.number }} \
+            --add-label $(echo '${{ steps.label-and-comment.outputs.labels }}' | jq -r '. | join(",")')
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Comment on PR
+        if: steps.label-and-comment.outputs.should_comment == 'true'
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const user = '${{ steps.label-and-comment.outputs.user }}';
+
+            const body = `
+            Hello @${user},
+
+            Thank you very much for submitting this PR to us!
+
+            This is what will happen next:
+
+            1. CI tests will run against your PR to ensure quality and consistency.
+            2. Next, human contributors from paperless-ngx review your changes. ${reviewNote}
+            3. Please address any issues that come up during the review as soon as you are able to.
+            4. If accepted, your pull request will be merged into the \`dev\` branch and changes there will be tested further.
+            5. Eventually, changes from you and other contributors will be merged into \`main\` and a new release will be made.
+
+            You'll be hearing from us soon, and thank you again for contributing to our project.
+            `;
+
+            await github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body,
+            });