feat(git): default pull to rebase

Add pull.rebase to git/config template and simplify git_clean to rely on it.

.zshrc

@@ -322,8 +322,7 @@ function git_clean() {
     fi
 
     git checkout "$base_branch" && \
-        git config pull.rebase false && \
-        git pull --rebase && \
+        git pull && \
         git branch --merged | grep -v " $base_branch$" | xargs git branch -d 2>/dev/null; \
         git branch -vv | awk '/: gone]/{print $1}' | xargs git branch -D 2>/dev/null; \
         git worktree prune --verbose

git/config

@@ -1,6 +1,9 @@
 [init]
 	defaultBranch = main
 
+[pull]
+	rebase = true
+
 [user]
     name = YOUR_NAME
     signingkey = YOUR_SSH_SIGNING_KEY