Iris: Add about-iris link in first message

[RY997]

Checklist

General

• I tested all changes and their related features with all corresponding user types on a test server.
• This is a small issue that I tested locally and was confirmed by another developer on a test server.
• Language: I followed the guidelines for inclusive, diversity-sensitive, and appreciative language.
• I chose a title conforming to the naming conventions for pull requests.

Client

• Important: I implemented the changes with a very good performance, prevented too many (unnecessary) REST calls and made sure the UI is responsive, even with large data.
• I followed the coding and design guidelines.
• Following the theming guidelines, I specified colors only in the theming variable files and checked that the changes look consistent in both the light and the dark theme.
• I added multiple integration tests (Jest) related to the features (with a high test coverage), while following the test guidelines.
• I added authorities to all new routes and checked the course groups for displaying navigation elements (links, buttons).
• I documented the TypeScript code using JSDoc style.
• I added multiple screenshots/screencasts of my UI changes.
• I translated all newly inserted strings into English and German.

Motivation and Context

Add about-iris link in first greeting message

Description

Attach about-iris link to "here" in first message

Steps for Testing

Prerequisites:

• 1 Student
• 1 new Programming Exercise with Iris enabled

1. Log in to Artemis
2. Navigate to Programming exercise
3. Open Iris and click "here" in first message, go to About Iris page

Review Progress

Performance Review

• I confirm that the client changes (in particular related to REST calls and UI responsiveness) are implemented with a very good performance
• I confirm that the server changes (in particular related to database calls) are implemented with a very good performance

Code Review

• Code Review 1
• Code Review 2

Manual Tests

• Test 1
• Test 2

Exam Mode Test

• Test 1
• Test 2

Screenshots

[github-actions]

❌ Unable to deploy to test servers ❌

Testserver "artemis-test9.artemis.cit.tum.de" is already in use by PR #6894.

[asliayk]

tested on ts9, works fine!

[SolizerCodes]

Tested on ts9, first message works well 👍