docs(readme): move hero GIF to external release asset

Moves the 91 MB product-tour GIF out of the repo entirely. Standard
clones and CI checkouts no longer pull it — even LFS-aware clients
previously downloaded the blob on checkout, which made `git pull`
noticeably slower for everyone.

The file now lives as a release asset on a separate repo and is
referenced from README via its GitHub Fastly-backed download URL.
Removes the LFS tracking entry from .gitattributes.

.gitattributes

@@ -25,4 +25,3 @@
 *.eot  binary
 *.pdf  binary
 *.zip  binary
-.github/assets/TREK1.gif filter=lfs diff=lfs merge=lfs -text

.github/assets/TREK1.gif

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b9153871a41ca2c53ab9188ea400eb45f4065680eae0ee0ebc3fbcf18373d99c
-size 95418702

README.md

@@ -31,7 +31,7 @@ A self-hosted, real-time collaborative travel planner — with maps, budgets, pa
 
 <div align="center">
 
-<img src=".github/assets/TREK1.gif" alt="TREK — 60-second tour" width="100%" />
+<img src="https://github.com/mauriceboe/test/releases/download/readme-assets/TREK1.gif" alt="TREK — 60-second tour" width="100%" />
 
 </div>