chore: add brewfile

[ericchapman80]

This pull request primarily focuses on improving the setup process for OSX users by leveraging Homebrew. The major changes include the addition of a Brewfile which specifies the necessary dependencies, and an update to the README.md file to guide OSX users on how to install these prerequisites.

• Brewfile: Added a new file that contains a list of necessary dependencies for the project, including kubectl, kustomize, and helm. This allows OSX users with Homebrew installed to easily setup the required tools.
• README.md: Updated the prerequisites section to include instructions for OSX users on how to install the prerequisites using the brew bundle command. This simplifies the setup process for these users.

[ericchapman80]

@adrielp thanks for fixing my un-conventional commit? Any issues with me merging this one?