Add Rails installer

[sergii]

Summary of Changes

This pull request introduces several enhancements to the scalar_ruby gem:

1. Rails installer addition:

   • A new Rails installer has been implemented to facilitate seamless integration of the scalar_ruby gem into Rails applications. By run bin/rails generate scalar:install you can easily setup scalar_ruby into your Rails application.

2. CI pipeline optimization:

   • A bin/check script has been added to streamline the continuous integration process.
   • The GitHub Actions workflow has been updated to utilize this script, ensuring consistency between local development and CI environments.
   • Enabled parallelism (--jobs 4 --retry 3) in the bundle install command, which made the dependency installation process approximately 29.41% faster.

3. GitHub Workflow Improvements:

   • Updated the GitHub workflow file to include meaningful job names, making it easier to understand the purpose of each job at a glance.
   • Job names now reflect the Ruby version being tested, for example: Ruby 3.0, Ruby 3.1, etc., instead of generic or less descriptive names.
   • This improves readability in the CI results and provides clear context when reviewing logs or debugging issues.

4. Gemfile dependencies adjustment:

   • Moved appropriate Gemfile dependencies to the proper environment (development) to ensure the gem's dependencies are well-organized and loaded only when necessary.

5. Ruby versions requirement updated:

   • The required Ruby version has been updated from >= 2.5 to >= 3.0, < 3.4.
   • This change aligns with the testing matrix in the CI workflow and ensures compatibility with newer language features and improvements.

👨‍💻 Bonus for developers:

6. Pre-Commit Hook Support:
   • With the introduction of bin/check, developers can now integrate a Git pre-commit hook to ensure code quality and consistency before committing changes.
   • The bin/check script consolidates key checks, including linting, testing, and security audits, making it an ideal tool for local validation.
   • To set up the pre-commit hook:
     1. Create a .git/hooks/pre-commit script:

        #!/bin/sh
        echo "Running pre-commit checks..."
        bin/check || { echo "Pre-commit checks failed! Aborting commit."; exit 1; }

     2. Make the script executable:

        chmod +x .git/hooks/pre-commit

   • Once set up, every git commit will run the bin/check script to validate your code, ensures that all required checks are performed locally before committing code and reducing the risk of introducing issues into the repository.

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1. The Sinatra and Grape generators are still in WIP.
2. Also, to check changes in README.md, here the Visual updates for REDME.md

[fthobe]

@dmytroshevchuk Can this be merged? I think it's a great addition.

[dmytroshevchuk]

@fthobe hey! sorry, I didn't have time to address this earlier. I'll merge this and release a new version of the gem shortly.

Thank you for keeping an eye on it, I really appreciate that!

[fthobe]

Most credit goes to @sergii who actually made this happen ;)