docs(design): remove SVG, use PNG logo only

SVG icon is no longer in use. public/logo.png (1024x1024 RGBA) is
the single logo asset. DESIGN.md updated accordingly: SVG snippet
removed, wordmark pattern and <head> references updated to PNG.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

node_modules/json5/lib/index.js

@@ -0,0 +1,9 @@
+const parse = require('./parse')
+const stringify = require('./stringify')
+
+const JSON5 = {
+    parse,
+    stringify,
+}
+
+module.exports = JSON5