feat: add git clone module (#46)

* feat: add `git-clone` module

* Fix script expansion for personalize

* Update README

git-clone/run.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env sh
+
+REPO_URL="${REPO_URL}"
+CLONE_PATH="${CLONE_PATH}"
+# Expand home if it's specified!
+CLONE_PATH="$${CLONE_PATH/#\~/$${HOME}}"
+
+# Check if the variable is empty...
+if [ -z "$REPO_URL" ]; then
+  echo "No repository specified!"
+  exit 1
+fi
+
+# Check if the variable is empty...
+if [ -z "$CLONE_PATH" ]; then
+  echo "No clone path specified!"
+  exit 1
+fi
+
+# Check if `git` is installed...
+if ! command -v git >/dev/null; then
+  echo "Git is not installed!"
+  exit 1
+fi
+
+# Check if the directory exists...
+if [ ! -d "$CLONE_PATH" ]; then
+  echo "Creating directory $CLONE_PATH..."
+  mkdir -p "$CLONE_PATH"
+else
+  echo "$CLONE_PATH already exists, skipping clone!"
+  exit 0
+fi
+
+# Clone the repository...
+echo "Cloning $REPO_URL to $CLONE_PATH..."
+git clone "$REPO_URL" "$CLONE_PATH"
+