feat: add PICO virtual pet

A dependency-free browser companion with live needs, a star-catching
mini game, daily goals, collectible accessories, local saving,
day/night scenery and a responsive layout.

.gitignore

@@ -0,0 +1,8 @@
+# Editor & OS
+.DS_Store
+Thumbs.db
+.vscode/
+.idea/
+
+# Local tooling
+node_modules/