Add middlewares

- Builder for chaining multiple middlewares on top of a base handler
- Middleware for adding a map of values to the request context
- Middleware for adding zerolog logging to the request

go.mod

@@ -1,3 +1,12 @@
 module gitlab.com/mstarongitlab/goutils
 
 go 1.19
+
+require github.com/rs/zerolog v1.33.0
+
+require (
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/rs/xid v1.5.0 // indirect
+	golang.org/x/sys v0.12.0 // indirect
+)