Rebrand to GlitchCraft with IPv6 support

Changes:
- Renamed from "Text Corruptor" to "GlitchCraft"
- New slogan: "Artisanal text corruption, served fresh!"
- Updated server to support both IPv4 and IPv6 (dual-stack)
- Server now listens on all interfaces (::) instead of just localhost
- Updated all references in code and documentation

The new name reflects both the glitch aesthetic and the craftsmanship
of creating beautifully corrupted text, with a playful tone.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

app/manifest.json

@@ -1,7 +1,7 @@
 {
-  "name": "Text Corruptor - Zalgo Text Generator",
-  "short_name": "Text Corruptor",
-  "description": "Transform your text into corrupted zalgo text with adjustable intensity",
+  "name": "GlitchCraft - Artisanal Text Corruption",
+  "short_name": "GlitchCraft",
+  "description": "Artisanal text corruption, served fresh! Create beautifully chaotic zalgo text with adjustable intensity",
   "start_url": "/",
   "display": "standalone",
   "background_color": "#0f0f14",