Onboard repo to semaphore

[autophagy]

We'd like to add linting/checking to the repo, so we'd need to onboard the repo to semaphore.

[Copilot]

Pull Request Overview

Onboard the repository to Semaphore for linting and checks by enabling the Semaphore integration in the CI configuration.

• Add a new semaphore section with enable: true and pipeline_enable: false.
• Keep Semaphore pipeline disabled until configuration is finalized.

Comments suppressed due to low confidence (2)

service.yml:12

• [nitpick] Consider adding a comment explaining why pipeline_enable is set to false so that future maintainers understand the rationale for disabling the pipeline by default.

  pipeline_enable: false

service.yml:10

• The semaphore key is not indented to match the existing section hierarchy; it should be indented with two spaces to align with github and codeowners at the same level.

semaphore: