This commit adds "read-all" permissions to golangci-lint, codecov, and sonarqube workflow files. This change ensures that all necessary activities are allowed during the workflow processes.
This commit introduces the .gitignore configuration file and adds SPDX headers to several files including test and documentation files. The headers provide license information in a standardized format which can be easily picked up by automated tools for license compliance checks. Additionally, it deleted a .idea/.gitignore file, which is a project specific IDE configuration file not necessary for the repository. It also introduced a README.md file providing more insightful information about the project.
