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.

src/main/resources/db/container/V1__init.sql

@@ -2,13 +2,18 @@
 -- For the normal WebGoat server there is a bean which already provided the schema (and creates it see DatabaseInitialization)
 CREATE SCHEMA IF NOT EXISTS CONTAINER;
 
-create
-    table CONTAINER.assignment
+create table CONTAINER.assignment
 (
-    solved boolean not null,
-    id     bigint generated by default as identity (start with 1),
-    name   varchar(255),
-    path   varchar(255),
+    id   bigint generated by default as identity (start with 1),
+    name varchar(255),
+    path varchar(255),
+    primary key (id)
+);
+create table CONTAINER.assignment_progress
+(
+    solved        boolean not null,
+    assignment_id bigint unique,
+    id            bigint generated by default as identity (start with 1),
     primary key (id)
 );
 create table CONTAINER.lesson_progress
@@ -55,8 +60,10 @@ create table CONTAINER.email
     title     VARCHAR(255)
 );
 
+alter table CONTAINER.assignment_progress
+    add constraint FK7o6abukma83ku3xrge9sy0qnr foreign key (assignment_id) references CONTAINER.assignment;
 alter table CONTAINER.lesson_progress_assignments
-    add constraint FKbd9xavuwr1rxbcqhcu3jckyro foreign key (assignments_id) references CONTAINER.assignment;
+    add constraint FKrw89vmnela8kj0nbg1xdws5bt foreign key (assignments_id) references CONTAINER.assignment_progress;
 alter table CONTAINER.lesson_progress_assignments
     add constraint FKl8vg2qfqhmsnt18qqcyydq7iu foreign key (lesson_progress_id) references CONTAINER.lesson_progress;
 alter table CONTAINER.user_progress_lesson_progress