feat: Adds stack separators, removes some unused nodes from cli-doc module

Sources/CliDocCore/Nodes/HStack.swift

@@ -4,21 +4,53 @@ public struct HStack: TextNode {
   @usableFromInline
   let content: [any TextNode]
 
-  @usableFromInline
-  let separator: Separator.Horizontal
-
   @inlinable
   public init(
-    separator: Separator.Horizontal = .space(count: 1),
     @TextBuilder content: () -> any TextNode
   ) {
     self.content = array(from: content())
-    self.separator = separator
   }
 
   @inlinable
   public var body: some TextNode {
-    content.removingEmptys()
-      .joined(separator: separator.render())
+    style(.separator(.space()))
+  }
+}
+
+public extension HStack {
+
+  func style<S: HStackStyle>(_ style: S) -> some TextNode {
+    style.render(content: .init(content: content))
+  }
+
+  func separator(_ separator: Separator.Horizontal) -> some TextNode {
+    style(.separator(separator))
+  }
+}
+
+// MARK: - Style
+
+public protocol HStackStyle: TextModifier where Content == StackConfiguration {}
+
+public extension HStackStyle where Self == HStackSeparatorStyle {
+
+  static func separator(_ separator: Separator.Horizontal) -> Self {
+    HStackSeparatorStyle(separator: separator)
+  }
+
+}
+
+public struct HStackSeparatorStyle: HStackStyle {
+  @usableFromInline
+  let separator: Separator.Horizontal
+
+  @usableFromInline
+  init(separator: Separator.Horizontal) {
+    self.separator = separator
+  }
+
+  @inlinable
+  public func render(content: StackConfiguration) -> some TextNode {
+    AnySeparatableStackNode(content: content, separator: separator)
   }
 }