Erich's personal platform support for MacOS

TODO: Make a prompter script for the above, automate incrementally.

1. Install XCode via App Store.
2. Install Homebrew bundle using brewfile repo.
   1. Add Homebrew binaries directory to PATH.
      1. Ensure that Homebrew's git takes precendence in PATH over XCode's copy of git.
   2. Run easy-resize-plus-move malicious check removal command.
3. Configure dotfiles with bellboy.toml via bellboy:
4. cargo install --git https://github.com/ErichDonGubler/git-aliases
5. Install git-assembler using pyoxidizer.
6. TODO: Set up keys and stuff.