Add support of configurable go versions

[syncom]

Add a config field go_version to allow the golang version to be specified. Update CI to test it.

[Copilot]

Pull Request Overview

This pull request adds support for specifying a Golang version via a new configuration field and updates the CI process to test the chosen version.

• Added a new "go_version" field in the configuration struct and updated validation logic
• Integrated the new field into template generation and error messages
• Updated the README to document the new configuration option

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated no comments.

File	Description
pkg/r10e-docker/r10edocker.go	Added go_version field, validation, and updated template usage
pkg/r10e-docker/nixpkgs_go_versions.go	Introduced mapping of Go versions to Nixpkgs commits and default version
README.md	Updated usage instructions to include go_version support

Files not reviewed (2)

• pkg/r10e-docker/files/Dockerfile: Language not supported
• scripts/test_configs.sh: Language not supported

Comments suppressed due to low confidence (1)

pkg/r10e-docker/r10edocker.go:133

• [nitpick] Consider renaming the variable 'templateConfig' to avoid shadowing its type and to improve code clarity, for example, use 'tmplConfig' instead.

templateConfig := templateConfig{

[Copilot]

Pull Request Overview

This PR adds support for a configurable Go version by introducing a "go_version" field in the configuration and updating the CI to use it. Key changes include:

• Adding a new "go_version" field to the Config struct and associated defaulting/validation logic.
• Introducing the mapping between Go versions and Nixpkgs commits in a new file.
• Updating documentation in the README to describe the new configuration field.

Reviewed Changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated 1 comment.

File	Description
pkg/r10e-docker/r10edocker.go	Adds go_version support with validation and updates template configuration
pkg/r10e-docker/nixpkgs_go_versions.go	Provides the mapping from Go versions to Nixpkgs commit data
README.md	Documents the new go_version field and its usage in the configuration file

Files not reviewed (2)

• pkg/r10e-docker/files/Dockerfile: Language not supported
• scripts/test_configs.sh: Language not supported

Comments suppressed due to low confidence (1)

pkg/r10e-docker/r10edocker.go:160

• [nitpick] Consider renaming 'tmpltConfig' to a more descriptive name (e.g., 'templateConfigInstance') to improve clarity.

return template.Execute(f, tmpltConfig)

[Copilot]

The unsupported Go version check in GenR10eDocker duplicates validation already performed in ReadConfigFile. Consider consolidating the validation to reduce redundancy.