chore: pre-commit updates

[maryamtahhan]

Add a workflow that runs the pre-commit jobs to
cover the case where a developer hasn't opted into pre-commit. Also add the conventional commit message hook and enable more golang linters. The commits also tidies up the markdown files that had line length
issues.

[github-actions]

🤖 SeineSailor

Here's a concise summary of the pull request changes:

This "chore: pre-commit updates" pull request focuses on enhancing code quality and consistency by introducing a new GitHub Actions workflow for pre-commit jobs. Key modifications include:

• Updates to configuration files (.golangci.yml, .pre-commit-config.yaml, .yamllint.yaml) to enable more Golang linters and add a conventional commit message hook.
• Rectification of line length issues in markdown files (e2e/tools/validator/README.md, manifests/compose/validation/README.md) and updates to comments in shell scripts.
• Removal of a redundant line in the Dockerfile (manifests/compose/validation/dockerfiles/Dockerfile.scaphandre).

These changes will improve code quality, consistency, and maintainability. The new pre-commit workflow ensures that developers adhere to coding standards, even if they haven't opted into pre-commit locally. The updates to markdown files and Dockerfile contribute to a cleaner and more organized codebase.

Observation: It's great to see the emphasis on code quality and consistency. However, it would be beneficial to include more detailed commit messages or comments explaining the reasoning behind specific changes, especially for future reference or knowledge transfer.