feat(service): add Termix

[ShadowArcanist]

Changes

• Added Termix to one click service

Category

• Adding new one click service

Docs

• Will add docs directly to https://github.com/coollabsio/coolify-docs/tree/shadow/improve-layout (will be merged to v4.x soon)

AI Assistance

• AI was NOT used to create this PR

Testing

• Deployed it using "docker compose empty" and it works fine behind traefik without any issues

Contributor Agreement

Important

• I have read and understood the contributor guidelines. If I have failed to follow any guideline, I understand that this PR may be closed without review.
• I have searched existing issues and pull requests (including closed ones) to ensure this isn't a duplicate.
• I have tested all the changes thoroughly with a local development instance of Coolify and I am confident that they will work as expected when a maintainer tests them.