Fix dev install

[lewtun]

What does this PR do?

Fixes an issue where repeated use of make dev fails due to the symbolic link creation. The fix is to check/unlink an existing symlink and recreate it if needed.

Before submitting

• [ ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• [ ] Did you read the contributor guideline, Pull Request section?
• [ ] Was this discussed/approved via a GitHub issue? Please add a link to it if that's the case.
• [ ] Did you make sure to update the documentation with your changes? Here are the documentation guidelines.
• [ ] Did you write any new necessary tests?

Who can review?

Anyone in the community is free to review the PR once the tests have passed. Feel free to tag members/contributors who may be interested in your PR.

[lewtun]

Yes I agree this symlink business was not a great choice for the chat CLI. Let's revisit later