Refactor to support multiple OS's

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

home/.zshrc

@@ -0,0 +1,30 @@
+PATH_DIRS=(
+  "${HOME}/.bin"
+  "${KREW_ROOT:-${HOME}/.krew}/bin"
+  "${GOPATH:-${HOME}/goworkspace}/bin"
+  "${HOME}/.cargo/bin"
+  "/home/linuxbrew/.linuxbrew/bin"
+  "/usr/local/bin"
+  "/usr/bin"
+  "/bin"
+  "/usr/sbin"
+  "/sbin"
+  "${PATH}"
+)
+export PATH=${"${PATH_DIRS[*]}"// /:}
+
+if [ ! -z ~/.additional_dotfiles/credentials ]; then
+  source ~/.additional_dotfiles/credentials
+fi
+
+for filename in ~/.dotfiles/*; do
+  source $filename
+done
+
+for filename in ~/.additional_dotfiles/*; do
+  source $filename
+done
+
+rm -f ~/.zcompdump; compinit
+
+eval "$(starship init zsh)"