Move variable-files to group_vars directory

The group_vars dir is the standard destination for ansible to look for
variable-files. So I do not have to declare them in the main.yml
anymore. This change will make it easier for me to reason about upcoming
changes, like using a vault for sensitive information.

group_vars/localhost/macos.config.yml

@@ -0,0 +1,51 @@
+# brew packages are packages for the command line
+brew_packages:
+- asciidoctor
+- awscli
+- bind
+- btop
+- colordiff
+- eza
+- fd
+- git
+- git-delta
+- gcloud-cli
+- graphviz
+- htop
+- hugo
+- imagemagick
+- jq
+- k9s
+- kubernetes-cli
+- lesspipe
+- lynx
+- mutt
+- nmap
+- nvim
+- oathtool
+- opentofu
+- plantuml
+- pgcli
+- ripgrep
+- stow
+- tree
+- uuid
+- whois
+- zoxide
+
+# brew casks are visual programms
+brew_casks:
+- alacritty
+- enpass
+- firefox
+- firefox@developer-edition
+- gimp
+- gnucash
+- google-chrome
+- kitty
+- spotify
+- ungoogled-chromium
+
+# mas apps are apps from the apple app-store
+mas_apps: []
+