Deprecate NW.js Windows and Linux support

src/p4/PackagerOptions.svelte

@@ -177,6 +177,13 @@
   input:invalid {
     outline: 2px solid red;
   }
+  .warning {
+    font-weight: bold;
+    background: yellow;
+    color: black;
+    padding: 10px;
+    border-radius: 10px;
+  }
 </style>
 
 <Section accent="#FFAB19">
@@ -496,6 +503,9 @@
           <h2>{$_('win.furtherSteps')}</h2>
           <p>To change the icon of the executable file or create an installer program, download and run <a href="https://github.com/TurboWarp/packager-extras/releases">TurboWarp Packager Extras</a> and select the output of this website.</p>
           <p>All Windows applications generated by this site are unsigned, so users may see SmartScreen warnings when they try to launch it for the first time.</p>
+          {#if $options.target.includes('nwjs')}
+            <p class="warning">NW.js support is deprecated and may be removed in the future. Use Electron instead if possible.</p>
+          {/if}
           {#if $options.target.endsWith('64')}
             <p>The application will only run on 64-bit x86 computers.</p>
           {:else if $options.target.endsWith('32')}
@@ -531,8 +541,8 @@
         <p>The application will only run on 64-bit x86 computers. 32-bit computers, Raspberry Pis, and other ARM devices will not work.</p>
         {#if $options.target.includes('electron')}
           <p>The application is started by running <code>start.sh</code>.</p>
-        {/if}
-        {#if $options.target.includes('nwjs')}
+        {:else if $options.target.includes('nwjs')}
+          <p class="warning">NW.js support is deprecated and may be removed in the future. Use Electron instead if possible.</p>
           <p>For further help and steps, see <a href="https://docs.nwjs.io/en/latest/For%20Users/Package%20and%20Distribute/#linux">NW.js Documentation</a>.</p>
         {/if}
       {/if}