Add missing Github workflows

.github/workflows/auto-author-assign.yml

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+name: Auto Author Assign
+
+on:
+  pull_request_target:
+    types: [ opened, reopened ]
+
+permissions:
+  pull-requests: write
+
+jobs:
+  assign-author:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: toshimaru/[email protected]

.github/workflows/dependent-issues.yml

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+name: Dependent Issues
+
+on:
+  issues:
+    types:
+      - opened
+      - edited
+      - closed
+      - reopened
+  pull_request_target:
+    types:
+      - opened
+      - edited
+      - closed
+      - reopened
+      # Makes sure we always add status check for PRs. Useful only if
+      # this action is required to pass before merging. Otherwise, it
+      # can be removed.
+      - synchronize
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: z0al/dependent-issues@v1
+        env:
+          # (Required) The token to use to make API calls to GitHub.
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/rebase-default-branch.yml

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+# GitHub Actions Virtual Environments
+# https://github.com/actions/virtual-environments/
+
+# Rebases a pull request on the repo's default branch when the "rebase" label is added
+# Note: you'll need to add a personal access token to your repo, `PERSONAL_ACCESS_TOKEN`. (`REBASE_PR_TOKEN`)
+# Link: https://github.com/jessesquires/gh-workflows/blob/main/.github/workflows/rebase-default-branch.yml
+
+name: Rebase Pull Request
+
+on:
+  pull_request:
+    types: [ labeled ]
+
+env:
+  DEFAULT_BRANCH: ${{ github.event.repository.default_branch }}
+
+jobs:
+  main:
+    if: ${{ contains(github.event.*.labels.*.name, 'rebase') }}
+    name: Rebase
+    runs-on: ubuntu-latest
+    steps:
+      - name: git checkout
+        uses: actions/checkout@v3
+        with:
+          token: ${{ secrets.REBASE_PR_TOKEN }}
+          ref: ${{ github.event.pull_request.head.ref }}
+          fetch-depth: 0
+
+      # Link: https://httgp.com/signing-commits-in-github-actions/
+      - name: Import bot's GPG key for signing commits
+        id: import-gpg
+        uses: crazy-max/ghaction-import-gpg@v4
+        with:
+          gpg_private_key: ${{ secrets.BOT_GPG_PRIVATE_KEY }}
+          passphrase: ${{ secrets.BOT_GPG_PASSPHRASE }}
+          git_config_global: true
+          git_user_signingkey: true
+          git_commit_gpgsign: true
+
+      - name: perform rebase
+        run: |
+          git config --global user.email "[email protected]"
+          git status
+          git pull
+          git checkout "$DEFAULT_BRANCH"
+          git status
+          git pull
+          git checkout "$GITHUB_HEAD_REF"
+          git rebase "$DEFAULT_BRANCH"
+          git push --force-with-lease
+          git status
+
+      # Link: https://github.com/marketplace/actions/actions-ecosystem-remove-labels
+      - name: remove label
+        if: always()
+        uses: actions-ecosystem/action-remove-labels@v1
+        with:
+          labels: rebase