Update FRE message to get any Khoj client to sync files with server

src/khoj/interface/web/chat.html

@@ -17,7 +17,7 @@ Hi, I am Khoj, your open, personal AI 👋🏽. I can help:
 - 💡 Be a sounding board for your ideas
 - 📜 Chat with your notes & documents
 
-Download the [🖥️ Desktop app](https://khoj.dev/downloads) to chat with your computer docs.
+Get the Khoj [Desktop](https://khoj.dev/downloads), [Obsidian](https://docs.khoj.dev/#/obsidian?id=setup) or [Emacs](https://docs.khoj.dev/#/emacs?id=setup) app to search, chat with your 🖥️ computer docs.
 
 To get started, just start typing below. You can also type / to see a list of commands.
 `.trim()

src/khoj/interface/web/content_source_computer_input.html

@@ -7,7 +7,7 @@
             <span class="card-title-text">Files</span>
             <div class="instructions">
                 <p class="card-description">Manage files from your computer</p>
-                <p id="get-desktop-client" class="card-description">Download the <a href="https://khoj.dev/downloads">Khoj Desktop app</a> to sync documents from your computer</p>
+                <p id="get-desktop-client" class="card-description">Get the Khoj <a href="https://khoj.dev/downloads">Desktop</a>, <a href="https://docs.khoj.dev/#/obsidian?id=setup">Obsidian</a> or <a href="https://docs.khoj.dev/#/emacs?id=setup">Emacs</a> app to sync documents from your computer</p>
             </div>
         </h2>
         <div class="section-manage-files">