feat(git): add aliases `gcas` and `gcasm` for commit with sign-off (#8881)

plugins/git/README.md

@@ -41,6 +41,8 @@ plugins=(... git)
 | gcan!                | git commit -v -a --no-edit --amend                                                                                               |
 | gcans!               | git commit -v -a -s --no-edit --amend                                                                                            |
 | gcam                 | git commit -a -m                                                                                                                 |
+| gcas                 | git commit -a -s                                                                                                                 |
+| gcasm                | git commit -a -s -m                                                                                                                  |
 | gcsm                 | git commit -s -m                                                                                                                 |
 | gcb                  | git checkout -b                                                                                                                  |
 | gcf                  | git config --list                                                                                                                |

plugins/git/git.plugin.zsh

@@ -80,6 +80,8 @@ alias gcan!='git commit -v -a --no-edit --amend'
 alias gcans!='git commit -v -a -s --no-edit --amend'
 alias gcam='git commit -a -m'
 alias gcsm='git commit -s -m'
+alias gcas='git commit -a -s'
+alias gcasm='git commit -a -s -m'
 alias gcb='git checkout -b'
 alias gcf='git config --list'
 alias gcl='git clone --recurse-submodules'