👷📝 Set up templating (#180)

## Description

This PR sets up the templating workflow that synchronizes common files
across our repositories.

## Checklist:

- [x] The pull request only contains commits that are focused and
relevant to this change.
- [x] ~I have added appropriate tests that cover the new/changed
functionality.~
- [x] ~I have updated the documentation to reflect these changes.~
- [x] The changes follow the project's style guidelines and introduce no
new warnings.
- [x] The changes are fully tested and pass the CI checks.
- [x] I have reviewed my own code changes.

Author: denialhaag

.github/workflows/templating.yml

@@ -0,0 +1,28 @@
+name: Templating
+on:
+  pull_request:
+    paths:
+      - ".github/workflows/templating.yml"
+  workflow_dispatch: # Allow manual triggering
+
+jobs:
+  render-template:
+    name: Render template
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - id: create-token
+        uses: actions/create-github-app-token@v2
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+      - uses: munich-quantum-toolkit/templates@0480e463d360399c4f1fdf1464521f8593d583d5 # v1.1.3
+        with:
+          token: ${{ steps.create-token.outputs.token }}
+          name: ProblemSolver
+          organization: ${{ github.repository_owner }}
+          project-type: pure-python
+          repository: ${{ github.event.repository.name }}
+          has-changelog-and-upgrade-guide: false