* ci: Optimize GitHub actions and update Go versions.

- Add GitHub actions for unit testing, linting, building, and releasing
- Use a matrix strategy to test on different versions and platforms
- Update setup-go and go-version options for compatibility
- Format code and build zip files for different operating systems
- Upload releases to GitHub with specific asset names and types

* fix: Refactor item file naming convention

- Update `filename()` function to return `UnsupportedItem` in specific cases
- Replace `UnknownItem` with `UnsupportedItem` in `Filename` method of `Item` struct
- Refactor code for clarity and consistency

* ci: Update GitHub workflow with latest setup-go version

- Update setup-go action to v3 in lint.yml GitHub workflow
- Omits some big changes in file diff summary
- Improve overall workflow reliability and efficiency

* ci: Improve GitHub actions across platforms

- Improve Windows compatibility in build workflow
- Optimize unit testing for pull requests
- Upgrade Coveralls GitHub action to v2 for improved coverage tracking

* build: Optimize build process for consistency and efficiency

- Ensure consistency of line endings by disabling Git's automatic conversion
- Add format check for Windows systems
- Update Go version in strategy matrix to `1.21.x`
- Remove unused dependencies from build process
- Include all packages in repository in build command

* ci: Refactor GitHub workflow configuration

- Remove unnecessary checks for `windows-latest` in github workflow
- Change `gofmt` check to `diff` for formatting
- Remove unneeded Git configuration for encoding of line endings
- Close #273

- Update Github Actions workflows to use `main` branch instead of `master`.
- Rename `master` branch to `main` in `lint.yml` and `build.yml` files.
- Change default branch to `main` in `contributors.yml` workflow file.