Add new 'minimal' theme

themes/minimal.zsh-theme

+ZSH_THEME_GIT_PROMPT_PREFIX="%{$reset_color%}%{$fg[white]%}["
+ZSH_THEME_GIT_PROMPT_SUFFIX="]%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_DIRTY="%{$fg[red]%}●%{$reset_color%}"
+ZSH_THEME_GIT_PROMPT_CLEAN=""
+
+#Customized git status, oh-my-zsh currently does not allow render dirty status before branch
+git_custom_status() {
+  local cb=$(current_branch)
+  if [ -n "$cb" ]; then
+    echo "- $ZSH_THEME_GIT_PROMPT_PREFIX$(current_branch)$(parse_git_dirty)$ZSH_THEME_GIT_PROMPT_SUFFIX"
+  fi
+}
+
+
+PROMPT='%2~ $(git_custom_status) »%b '
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