feat(git): add comprehensive git folder management commands and update documentation

bin/list-git-folder

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+list-git-folder() {
+    if [[ -z "$1" ]]; then
+        echo '$1/path is empty.'
+        exit
+    fi
+    
+    # Define column widths
+    local path_width=35
+    local url_width=50
+    local branch_width=8
+
+    # Print table header
+    printf "| %-${path_width}s | %-${url_width}s | %-${branch_width}s |\n" "PATH" "URL" "BRANCH"
+    echo "|$(printf '%*s' $((path_width + 2)) '' | tr ' ' '-')|$(printf '%*s' $((url_width + 2)) '' | tr ' ' '-')|$(printf '%*s' $((branch_width + 2)) '' | tr ' ' '-')|"
+
+    local git_folders=$(ls-git-folder "$1")
+    for git_folder in $git_folders; do
+        local url=$(git config --file .gitmodules --get "submodule.$git_folder.url")
+        url=${url#git@github.com:}
+        url=${url%.git}
+        local branch=$(git -C "$git_folder" branch --show-current 2>/dev/null || echo "detached")
+        printf "| %-${path_width}s | %-${url_width}s | %-${branch_width}s |\n" "$git_folder" "$url" "${branch:-detached}"
+    done
+}