Merge setup.sh into install.sh to create a single comprehensive installer that handles dependency installation, Gitea authentication, repository cloning, git credential configuration, and CLI tool installation. Add ASCII art banner, improve user prompts with better formatting, and enhance error handling throughout the installation flow.
The previous implementation used `/latest/download/` which doesn't work with just's release naming convention. Now fetches the latest version tag from GitHub API and constructs the correct versioned download URL.
Add installer scripts and documentation for the InternalAI platform setup repository. This provides a streamlined installation process for the private InternalAI monorepo platform.
+ Add .gitignore with macOS, editor, and temporary file exclusions
+ Add comprehensive README.md with installation instructions, prerequisites, CLI commands, and troubleshooting guide
+ Add install.sh one-liner script that downloads and executes the main setup
