Add Formatting and Linting to Launcher

[VirajP1002]

What is the context of this PR?

The purpose of this PR is to Implement linters and code formatters to launcher to keep our code easy to read and more consistent.

• For Static files, the tools, ESLint & Prettier were implemented to do formatting and linting
• For Template files, djLint was added to do formatting and linting
• For Go files, an external tool called golangci-lint was added for linting and go fmt is used for formatting.

A Makefile was added to contain commands to format and lint files. The README was updated to include a section regarding formatting and linting where the list of Makefile commands are listed and instructions on how to add dependencies and set up the external linting tool. The pull_request.yml file was updated to ensure that linting is run as part of GHA.

How to review

• Ensure all Make commands work
• Ensure changes made are suitable
• Ensure GHA changes are correct
• Suggestions for external js file name if current is not suitable?
• Is there a need for the .prettierignore file since it only looks for CSS and JS files?
• Any configuration recommendations?

[berroar]

LGTM 👍