✨ (minimal): Añade macros declarativas a utilidades

- Incorpora nuevo *crate* `pagetop-minimal` con macros básicas para
  operaciones con cadenas, bloques de texto o colecciones clave-valor.
- Refactoriza código para usar `util::join!` y `util::join_pair!` en la
  concatenación de cadenas.
- Normaliza la gestión de localización usando `util::kv!` para los
  argumentos con pares clave-valor.
- Actualizada documentación y archivos README para reflejar la nueva
  estructura y funcionalidades.

Cargo.toml

@@ -17,11 +17,9 @@ authors.workspace = true
 [dependencies]
 chrono = "0.4"
 colored = "3.0"
-concat-string = "1.0"
 config = { version = "0.15", default-features = false, features = ["toml"] }
 figlet-rs = "0.1"
 getter-methods = "2.0"
-indoc = "2.0"
 itoa = "1.0"
 parking_lot = "0.12"
 paste = { package = "pastey", version = "0.1" }
@@ -43,6 +41,7 @@ actix-web-files = { package = "actix-files", version = "0.6" }
 serde.workspace = true
 
 pagetop-macros.workspace = true
+pagetop-minimal.workspace = true
 pagetop-statics.workspace = true
 
 [features]
@@ -65,6 +64,7 @@ members = [
     # Helpers
     "helpers/pagetop-build",
     "helpers/pagetop-macros",
+    "helpers/pagetop-minimal",
     "helpers/pagetop-statics",
     # Extensions
     "extensions/pagetop-aliner",
@@ -83,6 +83,7 @@ serde = { version = "1.0", features = ["derive"] }
 # Helpers
 pagetop-build = { version = "0.3", path = "helpers/pagetop-build" }
 pagetop-macros = { version = "0.2", path = "helpers/pagetop-macros" }
+pagetop-minimal = { version = "0.0", path = "helpers/pagetop-minimal" }
 pagetop-statics = { version = "0.1", path = "helpers/pagetop-statics" }
 # Extensions
 pagetop-aliner = { version = "0.0", path = "extensions/pagetop-aliner" }