Rename common/maps to common/hmaps (#14384)

Go's stdlid now has a maps package, which is very useful. We have been using imports on the form `xmaps "maps"`, but auto import tools doesn't handle this, which is annoying.

I have been thinking about this for some time, but have been holding back because of all the import changes. However, now is a good time to do this, with very little unmerged code.

modules/collect.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/bep/debounce"
 	"github.com/gohugoio/hugo/common/herrors"
+	"github.com/gohugoio/hugo/common/hmaps"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/paths"
 	"github.com/gohugoio/hugo/common/version"
@@ -35,8 +36,6 @@ import (
 
 	"github.com/spf13/cast"
 
-	"github.com/gohugoio/hugo/common/maps"
-
 	"github.com/gohugoio/hugo/parser/metadecoders"
 
 	"github.com/gohugoio/hugo/hugofs/files"
@@ -494,7 +493,7 @@ LOOP:
 		if err != nil {
 			c.logger.Warnf("Failed to read module config for %q in %q: %s", tc.Path(), themeTOML, err)
 		} else {
-			maps.PrepareParams(themeCfg)
+			hmaps.PrepareParams(themeCfg)
 		}
 	}