feat: Introduce Playwright for UI testing

Instead of using Robot Framework which does not run during a `mvn install`. Playwright seems to be the better approach. We can now write them as normal JUnit test and they are executed during a build.

Additionally this PR solves some interesting bugs found during writing Playwright tests:

- A reset of a lesson removes all assignments as a result another user wouldn't see any assignments
- If someone solves an assignment the assignment automatically got solved for a new user since the assignment included the `solved` flag which immediately got copied to new lesson progress.
- Introduction of assignment progress linking a assignment not directly to all users.

.github/workflows/test.yml

@@ -1,61 +0,0 @@
-name: "UI-Test"
-on:
-    pull_request:
-        paths-ignore:
-            - 'LICENSE'
-            - 'docs/**'
-    push:
-        tags-ignore:
-            - 'v*'
-        paths-ignore:
-            - '.txt'
-            - '*.MD'
-            - '*.md'
-            - 'LICENSE'
-            - 'docs/**'
-
-jobs:
-    build:
-        runs-on: ubuntu-latest
-        # display name of the job
-        name: "Robot framework test"
-        steps:
-            # Uses an default action to checkout the code
-            -   uses: actions/checkout@v4.1.6
-            # Uses an action to add Python to the VM
-            -   name: Setup Python
-                uses: actions/setup-python@v5
-                with:
-                    python-version: '3.7'
-                    architecture: x64
-            # Uses an action to add JDK 23 to the VM (and mvn?)
-            -   name: set up JDK 23
-                uses: actions/setup-java@v4.2.1
-                with:
-                    distribution: 'temurin'
-                    java-version: 23
-                    architecture: x64
-                    cache: 'maven'
-            -   uses: BSFishy/pip-action@v1
-                with:
-                    packages: |
-                        robotframework
-                        robotframework-SeleniumLibrary
-                        webdriver-manager
-                        selenium==4.9.1
-                    # TODO https://github.com/robotframework/SeleniumLibrary/issues/1835
-            -   name: Run with Maven
-                run: mvn --no-transfer-progress spring-boot:run &
-            -   name: Wait to start
-                uses: ifaxity/wait-on-action@v1
-                with:
-                    resource: http://127.0.0.1:8080/WebGoat
-            -   name: Test with Robotframework
-                run: python3 -m robot --variable HEADLESS:"1" --outputdir robotreport robot/goat.robot
-            # send report to forks only due to limits on permission tokens
-            -   name: Send report to commit
-                if: github.repository != 'WebGoat/WebGoat' && github.event_name == 'push'
-                uses: joonvena/robotframework-reporter-action@v2.2
-                with:
-                    gh_access_token: ${{ secrets.GITHUB_TOKEN }}
-                    report_path: 'robotreport'