Development: Add module/Java API for text exercises

[ole-ve]

Checklist

General

• Language: I followed the guidelines for inclusive, diversity-sensitive, and appreciative language.
• I chose a title conforming to the naming conventions for pull requests.

Server

• I strictly followed the principle of data economy for all database calls.
• I strictly followed the server coding and design guidelines.
• I documented the Java code using JavaDoc style.

Motivation and Context

As part of the server modularization, we "facade" the service/repository declaration and method calls to module-external classes via a module API provided by the respective module.

Description

These changes add the module API for text exercises.

Out of scope: Adding a PROFILE_TEXT to disable the module on server start. This requires a lot of frontend changes and testing.

Steps for Testing

Basically try to test all the functionality of text exercises regarding submissions, courses, and import/export.

1. Log in to Artemis
2. Create a text exercise
3. Update the exercise
4. Make a submission
5. Create an example submission
6. Import the student submission as example submission
7. Export the example submissions
8. Import the exercise into a new course
9. Delete the exercise in both courses

Exam Mode Testing

1. Log in to Artemis
2. Create a regular text exercise
3. Create an exam
4. Create a text exercise in the exam
5. Import the created text exercise from 2 into the exam
6. Participate in the exam and make submissions

Testserver States

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Review Progress

Performance Review

Code Review

• Code Review 1
• Code Review 2

Manual Tests

• Test 1
• Test 2

Exam Mode Test

• Test 1
• Test 2