feat: Add version checking and display

Integrated version checking into `cli_api.py` and `cli.py`

core/scripts/hysteria2/version.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+source /etc/hysteria/core/scripts/path.sh
+
+version_greater_equal() {
+    IFS='.' read -r -a local_version_parts <<< "$1"
+    IFS='.' read -r -a latest_version_parts <<< "$2"
+
+    for ((i=0; i<${#local_version_parts[@]}; i++)); do
+        if [[ -z ${latest_version_parts[i]} ]]; then
+            latest_version_parts[i]=0
+        fi
+
+        if ((10#${local_version_parts[i]} > 10#${latest_version_parts[i]})); then
+            return 0
+        elif ((10#${local_version_parts[i]} < 10#${latest_version_parts[i]})); then
+            return 1
+        fi
+    done
+
+    return 0
+}
+
+check_version() {
+    local_version=$(cat $LOCALVERSION)
+    latest_version=$(curl -s $LATESTVERSION)
+    latest_changelog=$(curl -s $LASTESTCHANGE)
+
+    
+  if version_greater_equal "$local_version" "$latest_version"; then
+    echo "Panel Version: $local_version"
+  else
+    echo "Panel Version: $local_version"
+    echo "Latest Version: $latest_version"
+    echo "${yellow}$latest_version Version Change Log:"
+    echo "$latest_changelog"
+  fi
+}
+
+show_version() {
+
+    local_version=$(cat "$LOCALVERSION")
+    echo "Panel Version: $local_version"
+
+}
+
+
+if [ "$1" == "check-version" ]; then
+  check_version
+elif [ "$1" == "show-version" ]; then
+  show_version
+else
+  echo "Usage: $0 [check|show]" >&2
+  exit 1
+fi
+
+exit 0