Copy unreleased changelogs to vscode-terraform on merge

.changes/unreleased/INTERNAL-20240722-152532.yaml

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+kind: INTERNAL
+body: Copy unreleased changelogs to vscode-terrafor on PR merge
+time: 2024-07-22T15:25:32.261657-04:00
+custom:
+    Issue: "1775"
+    Repository: terraform-ls

.github/workflows/copy-changelog.yml

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+# This workflow copies the changelog entries from terraform-ls to vscode-terraform
+# when a PR is merged.
+# https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#running-your-pull_request-workflow-when-a-pull-request-merges
+# https://github.com/actions/checkout?tab=readme-ov-file#checkout-multiple-repos-side-by-side
+name: Copy changelog to vscode-terraform
+
+on:
+  pull_request:
+    types:
+      - closed
+
+permissions:
+  pull-requests: write # https://docs.github.com/en/actions/using-jobs/assigning-permissions-to-jobs#defining-access-for-the-github_token-scopes  
+
+jobs:
+  update_vscode_terraform_changelog:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          path: terraform-ls
+
+      - name: Checkout tools repo
+        uses: actions/checkout@v4
+        with:
+          repository: hashicorp/vscode-terraform
+          path: vscode-terraform
+
+      - name: Copy changelog entry
+        run: |
+          cp terraform-ls/.changes/unreleased/*.yaml vscode-terraform/.changes/unreleased/
+
+      - name: Commit changelog entry
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          cd ./vscode-terraform
+          git config --global user.name "${{ vars.TF_DEVEX_CI_COMMIT_AUTHOR }}"
+          git config --global user.email "${{ vars.TF_DEVEX_CI_COMMIT_EMAIL }}"
+          git add .changes/unreleased/*.yaml
+          git commit -m "Copy changelog entries from terraform-ls"
+
+          # direct push
+          # git push "https://${{ vars.TF_DEVEX_CI_COMMIT_AUTHOR }}:${{ secrets.TF_DEVEX_COMMIT_GITHUB_TOKEN }}@github.com/hashicorp/vscode-terraform.git"
+
+          # pull request
+          # gh pr create -B main -H branch_to_merge --fill