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

Tests/CliDocCoreTests/CliDocCoreTests.swift

@@ -33,16 +33,20 @@ struct CliDocCoreTests {
     }
     #expect(stack.render() == "foo bar")
 
-    let tabStack = HStack(separator: .tab()) {
+    let tabStack = HStack {
       "foo"
       "bar"
     }
+    .separator(.tab())
+
     #expect(tabStack.render() == "foo\tbar")
 
-    let customStack = HStack(separator: .custom(":blob:")) {
+    let customStack = HStack {
       "foo"
       "bar"
     }
+    .separator(.custom(":blob:"))
+
     #expect(customStack.render() == "foo:blob:bar")
   }
 
@@ -58,10 +62,12 @@ struct CliDocCoreTests {
     bar
     """)
 
-    let customStack = VStack(separator: .custom("\n\t")) {
+    let customStack = VStack {
       "foo"
       "bar"
     }
+    .separator(.custom("\n\t"))
+
     #expect(customStack.render() == """
     foo
     \tbar

Tests/CliDocTests/CliDocTests.swift

@@ -12,16 +12,6 @@ struct CliDocTests {
     return true
   }()
 
-  @Test
-  func testNote() {
-    #expect(setupRainbow)
-    let note = Note(content: "Some note.")
-    let expected = """
-    \("NOTE:".yellow.bold) Some note.
-    """
-    #expect(note.render() == expected)
-  }
-
   @Test
   func testExamples() {
     #expect(setupRainbow)
@@ -95,7 +85,7 @@ extension ExampleSectionStyle where Self == DefaultExampleSectionStyle<CustomExa
 
 struct CustomExampleOnlyStyle: ExampleStyle {
   func render(content: ExampleConfiguration) -> some TextNode {
-    VStack(separator: .newLine(count: 2)) {
+    VStack {
       content.examples.map { example in
         VStack {
           example.label.red
@@ -103,5 +93,6 @@ struct CustomExampleOnlyStyle: ExampleStyle {
         }
       }
     }
+    .separator(.newLine(count: 2))
   }
 }