Split glitch-lab into standalone submodule

Co-authored-by: OpenAI Codex <codex@openai.com>

Author: highda

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "vibecode-snippets/chords-trainer"]
 	path = vibecode-snippets/chords-trainer
 	url = https://github.com/highda/chords-trainer.git
+[submodule "vibecode-snippets/glitch-lab"]
+	path = vibecode-snippets/glitch-lab
+	url = https://github.com/highda/glitch-lab.git

README.md

@@ -6,7 +6,7 @@
 
 [Pixel Sorter on Steroids](/vibecode-snippets/pixel-sorter.html)
 
-[Glitch Lab (Multi-FX)](/vibecode-snippets/glitch-lab/index.html)
+[Glitch Lab (Multi-FX)](/vibecode-snippets/glitch-lab/)
 
 ### CSS Helpers