feat: add animated demo GIF to README

Recorded with VHS — shows conversation growing from 0% to 100%
of context window, then auto-compacting back to 10%.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: andrew-iotx

README.md

@@ -10,14 +10,9 @@ Intelligent conversation compaction for LLM applications. When your conversation
 
 Extracted from battle-tested patterns powering production AI systems serving millions of users.
 
-```
-Messages grow...  ██████████████████████████████░░░░  85% full
-                                    │
-                              contextkit
-                                    │
-After compaction  ██████░░░░░░░░░░░░░░░░░░░░░░░░░░░░  18% full
-                  ↑ summary    ↑ preserved context
-```
+![contextkit demo](demo.gif)
+
+*Conversation grows to 100% of context window, then auto-compacts back to 10% — seamlessly.*
 
 ## The Problem
 

demo.gif

@@ -1,11 +1,12 @@
 Output demo.gif
 Set Shell "bash"
-Set FontSize 14
-Set Width 900
-Set Height 600
+Set FontSize 13
+Set Width 920
+Set Height 650
 Set Theme "Dracula"
 Set Padding 20
+Set TypingSpeed 50ms
 
 Type "npx tsx examples/demo-live.ts"
 Enter
-Sleep 25s
+Sleep 20s