feat(04-02): select CLDR and Laravel plural forms with PHP parameters

- Use go-i18n only to pick a category label, then substitute :name/:Name/:NAME
- Treat YAML maps as plurals when all keys are locale CLDR categories
- Parse pipe strings with {n} and [a,b]/[a,*] conditions at catalog load

Co-authored-by: Cursor <cursoragent@cursor.com>

go.mod

@@ -1,7 +1,6 @@
 module git.golem15.com/golem15/summercms
 
 go 1.27.0
-toolchain go1.27.0
 
 require (
 	github.com/fsnotify/fsnotify v1.10.1
@@ -14,10 +13,12 @@ require (
 	github.com/knadh/koanf/providers/env/v2 v2.0.1
 	github.com/knadh/koanf/providers/file v1.2.1
 	github.com/knadh/koanf/v2 v2.3.6
+	github.com/nicksnyder/go-i18n/v2 v2.6.1
 	github.com/spf13/cobra v1.10.2
 	github.com/testcontainers/testcontainers-go v0.44.0
 	github.com/testcontainers/testcontainers-go/modules/postgres v0.44.0
 	golang.org/x/term v0.46.0
+	golang.org/x/text v0.40.0
 	gorm.io/driver/postgres v1.6.3
 	gorm.io/gorm v1.31.2
 )
@@ -86,6 +87,5 @@ require (
 	golang.org/x/crypto v0.54.0 // indirect
 	golang.org/x/sync v0.22.0 // indirect
 	golang.org/x/sys v0.48.0 // indirect
-	golang.org/x/text v0.40.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )