Add minimal-git theme

Just like the minimal theme, but with git info

themes/minimal-git/minimal-git.theme.bash

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+SCM_THEME_PROMPT_PREFIX="${cyan}(${green}"
+SCM_THEME_PROMPT_SUFFIX="${cyan})"
+SCM_THEME_PROMPT_DIRTY=" ${red}✗"
+SCM_THEME_PROMPT_CLEAN=" ${bold_green}✓"
+
+PS1="$(scm_prompt_info)${reset_color} ${cyan}\W${reset_color} "