docs: remove marketing fluff and emojis

- Remove navigation emojis from README and docs/README
- Remove "Made with ❤️ for the Kubernetes community" footer
- Remove checkmark/celebration emojis from quick-start guide
- Remove "(This!)" annotation from architecture diagrams
- Replace emoji references with plain text in features documentation
- Remove GOOD/BAD emojis from production deployment guide
- Simplify congratulations message

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

docs/README.md

@@ -4,11 +4,11 @@ Central hub for Headlamp Polaris Plugin documentation.
 
 ## Quick Links
 
-- 🚀 [Quick Start](getting-started/quick-start.md)
-- 📖 [Installation Guide](getting-started/installation.md)
-- 🔧 [Troubleshooting](troubleshooting/README.md)
-- 🏗️ [Architecture](architecture/overview.md)
-- 💻 [Development](development/workflow.md)
+- [Quick Start](getting-started/quick-start.md)
+- [Installation Guide](getting-started/installation.md)
+- [Troubleshooting](troubleshooting/README.md)
+- [Architecture](architecture/overview.md)
+- [Development](development/workflow.md)
 
 ## Getting Started