Prepare for future screenshot assets

- Add assets/ to .gitignore
- Comment out README image placeholders until assets are captured

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -8,8 +8,11 @@ Your sessions stay local. Your AI remembers everything. Works with Claude, GPT,
 
 ---
 
+<!--
 ## What It Looks Like
 
+Uncomment this section after adding screenshots to assets/
+
 **A session in the terminal:**
 
 ![Session screenshot](assets/session-screenshot.png)
@@ -23,6 +26,7 @@ Your sessions stay local. Your AI remembers everything. Works with Claude, GPT,
 ![Demo](assets/demo.gif)
 
 ---
+-->
 
 ## Why This Exists