Add Lynx theme with Hugo modules and optimized author image

- Configure Lynx theme as Hugo module
- Add high-quality author.png generated from vector EPS source
- Update hugo.yaml with author configuration and module imports
- Add _vendor/ to .gitignore (Hugo module cache)
- Include custom CSS placeholder for future styling
- Set up proper module structure with go.mod and go.sum

go.mod

@@ -0,0 +1,5 @@
+module github.com/derekslenk/angrymichigander
+
+go 1.24.4
+
+require github.com/jpanther/lynx v1.4.0 // indirect