feat: add go

[gregofi]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for the Go programming language to the code evaluation system. The changes integrate Go as a new supported language with multiple compiler versions (1.25.1, 1.24.7, 1.23.12) and include all necessary configuration and infrastructure setup.

Key changes:

• Added Go language configuration with support for three compiler versions
• Added Go-specific infrastructure setup and execution commands
• Updated system limits to accommodate Go's higher process requirements

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
website/src/lib/types.ts	Added "go" to the LangKey type definition
website/src/lib/defaultPrograms.ts	Added default Go program with factorial example
website/src/lib/constants.ts	Added Go language configuration with compiler versions
evaluator/src/eval.rs	Added compiler name substitution in command strings
evaluator/infra/languages/go/setup.sh	Added Go installation and setup script
evaluator/infra/languages/config.toml	Added Go language configuration
evaluator/config/userspace.cfg	Increased process limit from 16 to 256 for Go
evaluator/config/config.yaml	Added Go language execution configuration
evaluator/README.md	Added documentation about Go-specific requirements
Makefile	Added build dependency to up target

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