Add theme barbuk

themes/barbuk/README.md

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+# BarbUk theme
+
+A minimal theme with a clean git prompt
+
+## Provided Information
+
+* Current git remote tool logo (support: github, gitlab, bitbucket)
+* Current path (red when user is root)
+* Current git info
+* Last command exit code (only shown when the exit code is greater than 0)
+
+## Examples
+
+### Clean
+
+```bash
+ ~ ❯ 
+```
+
+### Git
+
+```bash
+   ~/.dotfiles on  master ⤏  origin ↑2 •7 ✗ ❯
+ ```