feat(git): add gcfu alias for `commit --fixup` (#13027)

plugins/git/README.md

@@ -79,6 +79,7 @@ plugins=(... git)
 | `gcss`                 | `git commit -S -s`                                                                                                              |
 | `gcssm`                | `git commit -S -s -m`                                                                                                           |
 | `gcf`                  | `git config --list`                                                                                                             |
+| `gcfu`                 | `git commit --fixup`                                                                                                            |
 | `gdct`                 | `git describe --tags $(git rev-list --tags --max-count=1)`                                                                      |
 | `gd`                   | `git diff`                                                                                                                      |
 | `gdca`                 | `git diff --cached`                                                                                                             |

plugins/git/git.plugin.zsh

@@ -200,6 +200,7 @@ alias gc!='git commit --verbose --amend'
 alias gcn='git commit --verbose --no-edit'
 alias gcn!='git commit --verbose --no-edit --amend'
 alias gcf='git config --list'
+alias gcfu='git commit --fixup'
 alias gdct='git describe --tags $(git rev-list --tags --max-count=1)'
 alias gd='git diff'
 alias gdca='git diff --cached'