New release automations

.github/release-drafter.yml

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+_extends: vector-im/element-web

.github/workflows/release-drafter.yml

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+name: Release Drafter
+on:
+    push:
+        branches: [staging]
+concurrency: ${{ github.workflow }}
+jobs:
+    element-web:
+        runs-on: ubuntu-latest
+        outputs:
+            version: ${{ steps.release.outputs.tag_name }}
+        steps:
+            - name: Get draft release
+              id: release
+              uses: cardinalby/git-get-release-action@cedef2faf69cb7c55b285bad07688d04430b7ada # v1
+              env:
+                  GITHUB_TOKEN: ${{ secrets.ELEMENT_BOT_TOKEN }}
+                  repo: vector-im/element-web
+              with:
+                  latest: true
+
+    draft:
+        needs: element-web
+        runs-on: ubuntu-latest
+        steps:
+            - uses: release-drafter/release-drafter@dabcf3767562210392d862070ed2ef6434b9bc6f # v5
+              env:
+                  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+              with:
+                  disable-autolabeler: true
+                  version-template: ${{ needs.element-web.outputs.version }}

.github/workflows/release-gitflow.yml

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+# Gitflow merge-back master->develop
+name: Merge master -> develop
+on:
+    push:
+        branches: [master]
+concurrency: ${{ github.repository }}-${{ github.workflow }}
+jobs:
+    merge:
+        uses: matrix-org/matrix-js-sdk/.github/workflows/release-gitflow.yml@develop
+        secrets: inherit

.github/workflows/release.yml

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+name: Release Process
+on:
+    workflow_dispatch:
+        inputs:
+            mode:
+                description: What type of release
+                required: true
+                default: rc
+                type: choice
+                options:
+                    - rc
+                    - final
+concurrency: ${{ github.workflow }}
+jobs:
+    release:
+        uses: matrix-org/matrix-js-sdk/.github/workflows/release-action.yml@develop
+        secrets: inherit
+        with:
+            final: ${{ inputs.mode == 'final' }}
+            include-changes: vector-im/element-web@$VERSION
+            gpg-fingerprint: ${{ vars.GPG_FINGERPRINT }}
+            expected-asset-count: 1