feat(cli): add settings menu and VLESS log viewer with core selection

- Add settings menu to switch between Xray and V2Ray cores for VLESS connections
- Implement core type persistence in configuration with LoadSettings/SaveSettings
- Add VLESS error and access log viewer showing last 30 and 20 lines respectively
- Display current core type and system time in main menu
- Update VLESS connection to use selected core dynamically
- Refactor monitor.go to accept 'q' key input for graceful exit instead of signal handling
- Add proxy platform-specific implementations (proxy_unix.go, proxy_windows.go)
- Add downloader module for managing binary resources
- Include V2Ray and Xray configuration files and geodata (geoip.dat, geosite.dat)
- Update CLI imports to include path/filepath and time packages
- Improve user experience with core selection visibility and log diagnostics

v2ray/vpoint_socks_vmess.json

@@ -0,0 +1,25 @@
+{
+  "log": {
+    "loglevel": "warning"
+  },
+  "inbounds": [{
+    "port": 1080,
+    "listen": "127.0.0.1",
+    "protocol": "socks",
+    "settings": {
+      "auth": "noauth",
+      "udp": false,
+      "ip": "127.0.0.1"
+    }
+  }],
+  "outbounds": [{
+    "protocol": "freedom",
+    "settings": {},
+    "tag": "direct"
+  }],
+  "policy": {
+    "levels": {
+      "0": {"uplinkOnly": 0}
+    }
+  }
+}