BrewFile support and splitting software into prompts/files

[atomantic]

addresses #39

[Copilot]

Pull Request Overview

This PR refactors the software installation configuration by splitting a single config into per-manager files, adds support for a project-level .BrewFile, and updates scripts and docs to load and prompt on the new files.

• Split config.js into software/*.js files for each package manager
• Introduce .BrewFile support for additional Homebrew packages
• Update index.js, install.sh, and documentation to load software configs dynamically

Reviewed Changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
software/brew.js	New split file listing Homebrew CLI utilities
software/cask.js	New split file listing Homebrew GUI apps
software/npm.js	New split file listing global NPM packages
software/mas.js	New split file stub for Mac App Store apps
software/gem.js	New split file stub for Ruby gems
software/README.md	Doc added for each split config file
install.sh	Updated prompt message to reference software configuration files
index.js	Major refactor: dynamic imports of software/*.js, .BrewFile merge
homedir/.BrewFile	Sample .BrewFile for additional Homebrew packages
README.md	Updated top-level docs to reference the new software/ directory

Comments suppressed due to low confidence (2)

index.js:39

• New .BrewFile parsing and dynamic imports deserve dedicated tests to validate that additional packages are merged correctly and prompts behave as expected.

  const brewFileExists = fs.existsSync("./homedir/.BrewFile");

index.js:67

• [nitpick] The default property is not aligned under message, making the object literal formatting inconsistent. Re-indent for clarity and consistency.

        default: false,

[atomantic]

lgtm