feat: close likely duplicates (#20556)

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

.github/workflows/close-duplicates.yml

@@ -0,0 +1,96 @@
+on:
+  issues:
+    types: [opened]
+  discussion:
+    types: [created]
+
+name: Close likely duplicates
+permissions: {}
+
+jobs:
+  get_body:
+    runs-on: ubuntu-latest
+    env:
+      EVENT: ${{ toJSON(github.event) }}
+    outputs:
+      body: ${{ steps.get_body.outputs.body }}
+    steps:
+      - id: get_body
+        run: |
+          BODY=$(echo """$EVENT""" | jq -r '.issue // .discussion | .body' | base64 -w 0)
+          echo "body=$BODY" >> $GITHUB_OUTPUT
+
+  get_checkbox_json:
+    runs-on: ubuntu-latest
+    needs: get_body
+    container:
+      image: yshavit/mdq:0.7.2
+    outputs:
+      json: ${{ steps.get_checkbox.outputs.json }}
+    steps:
+      - id: get_checkbox
+        env:
+          BODY: ${{ needs.get_body.outputs.body }}
+        run: |
+          JSON=$(echo "$BODY" | base64 -d | /mdq --output json '# I have searched | - [?] Yes')
+          echo "json=$JSON" >> $GITHUB_OUTPUT
+
+  close_and_comment:
+    runs-on: ubuntu-latest
+    needs: get_checkbox_json
+    if: ${{ !fromJSON(needs.get_checkbox_json.outputs.json).items[0].list[0].checked }}
+    permissions:
+      issues: write
+      discussions: write
+    steps:
+      - name: Close issue
+        if: ${{ github.event_name == 'issues' }}
+        env:
+          GH_TOKEN: ${{ github.token }}
+          NODE_ID: ${{ github.event.issue.node_id }}
+        run: |
+          gh api graphql \
+            -f issueId="$NODE_ID" \
+            -f body="This issue has automatically been closed as it is likely a duplicate. We get a lot of duplicate threads each day, which is why we ask you in the template to confirm that you searched for duplicates before opening one." \
+            -f query='
+              mutation CommentAndCloseIssue($issueId: ID!, $body: String!) {
+                addComment(input: {
+                  subjectId: $issueId, 
+                  body: $body
+                }) {
+                  __typename
+                }
+              
+                closeIssue(input: {
+                  issueId: $issueId,
+                  stateReason: DUPLICATE
+                }) {
+                  __typename
+                }
+              }'
+
+      - name: Close discussion
+        if: ${{ github.event_name == 'discussion' && github.event.discussion.category.name == 'Feature Request' }}
+        env:
+          GH_TOKEN: ${{ github.token }}
+          NODE_ID: ${{ github.event.discussion.node_id }}
+        run: |
+          gh api graphql \
+            -f discussionId="$NODE_ID" \
+            -f body="This discussion has automatically been closed as it is likely a duplicate. We get a lot of duplicate threads each day, which is why we ask you in the template to confirm that you searched for duplicates before opening one." \
+            -f query='
+              mutation CommentAndCloseDiscussion($discussionId: ID!, $body: String!) {
+                addDiscussionComment(input: {
+                  discussionId: $discussionId,
+                  body: $body
+                }) {
+                  __typename
+                }
+              
+                closeDiscussion(input: {
+                  discussionId: $discussionId,
+                  reason: DUPLICATE
+                }) {
+                  __typename
+                }
+              }'